151001220 has 48 divisors (see below), whose sum is σ = 423642240. Its totient is φ = 40187136.

The previous prime is 151001209. The next prime is 151001239. The reversal of 151001220 is 22100151.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 151001196 and 151001205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31929 + ... + 36351.

It is an arithmetic number, because the mean of its divisors is an integer number (8825880).

Almost surely, 2^151001220 is an apocalyptic number.

151001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151001220 is an abundant number, since it is smaller than the sum of its proper divisors (272641020).

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

151001220 is a wasteful number, since it uses less digits than its factorization.

151001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004 (or 5002 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 151001220 is about 12288.2553684402. The cubic root of 151001220 is about 532.5088362835.

Adding to 151001220 its reverse (22100151), we get a palindrome (173101371).

The spelling of 151001220 in words is "one hundred fifty-one million, one thousand, two hundred twenty".