153721056 has 24 divisors (see below), whose sum is σ = 403518024. Its totient is φ = 51240320.

The previous prime is 153721049. The next prime is 153721079. The reversal of 153721056 is 650127351.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800535 + ... + 800726.

It is an arithmetic number, because the mean of its divisors is an integer number (16813251).

Almost surely, 2^153721056 is an apocalyptic number.

153721056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

153721056 is an abundant number, since it is smaller than the sum of its proper divisors (249796968).

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

153721056 is a wasteful number, since it uses less digits than its factorization.

153721056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601274 (or 1601266 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 153721056 is about 12398.4295779748. The cubic root of 153721056 is about 535.6870156125.

The spelling of 153721056 in words is "one hundred fifty-three million, seven hundred twenty-one thousand, fifty-six".