151207220 has 12 divisors (see below), whose sum is σ = 317535204. Its totient is φ = 60482880.

The previous prime is 151207211. The next prime is 151207229. The reversal of 151207220 is 22702151.

It is an interprime number because it is at equal distance from previous prime (151207211) and next prime (151207229).

It can be written as a sum of positive squares in 2 ways, for example, as 29899024 + 121308196 = 5468^2 + 11014^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 7560361 = 151207220 / (1 + 5 + 1 + 2 + 0 + 7 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 151207192 and 151207201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151207229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3780161 + ... + 3780200.

It is an arithmetic number, because the mean of its divisors is an integer number (26461267).

Almost surely, 2^151207220 is an apocalyptic number.

151207220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151207220 is an abundant number, since it is smaller than the sum of its proper divisors (166327984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151207220 is a wasteful number, since it uses less digits than its factorization.

151207220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7560370 (or 7560368 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 151207220 is about 12296.6344989188. The cubic root of 151207220 is about 532.7508806287.

Adding to 151207220 its reverse (22702151), we get a palindrome (173909371).

The spelling of 151207220 in words is "one hundred fifty-one million, two hundred seven thousand, two hundred twenty".