151115220 has 60 divisors (see below), whose sum is σ = 474059124. Its totient is φ = 40296960.

The previous prime is 151115207. The next prime is 151115231. The reversal of 151115220 is 22511151.

151115220 is a `hidden beast` number, since 1 + 511 + 152 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 114318864 + 36796356 = 10692^2 + 6066^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 151115193 and 151115202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45021 + ... + 48260.

Almost surely, 2^151115220 is an apocalyptic number.

151115220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151115220 is an abundant number, since it is smaller than the sum of its proper divisors (322943904).

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

151115220 is a wasteful number, since it uses less digits than its factorization.

151115220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93302 (or 93291 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 151115220 is about 12292.8930687613. The cubic root of 151115220 is about 532.6428103376.

Adding to 151115220 its reverse (22511151), we get a palindrome (173626371).

The spelling of 151115220 in words is "one hundred fifty-one million, one hundred fifteen thousand, two hundred twenty".