151731920 has 40 divisors (see below), whose sum is σ = 368119296. Its totient is φ = 58053248.

The previous prime is 151731911. The next prime is 151731947. The reversal of 151731920 is 29137151.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39392 + ... + 43071.

Almost surely, 2^151731920 is an apocalyptic number.

151731920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151731920 is an abundant number, since it is smaller than the sum of its proper divisors (216387376).

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

151731920 is a wasteful number, since it uses less digits than its factorization.

151731920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82499 (or 82493 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 151731920 is about 12317.9511283330. The cubic root of 151731920 is about 533.3663972557.

The spelling of 151731920 in words is "one hundred fifty-one million, seven hundred thirty-one thousand, nine hundred twenty".