157643232 has 24 divisors (see below), whose sum is σ = 413813736. Its totient is φ = 52547712.

The previous prime is 157643197. The next prime is 157643257. The reversal of 157643232 is 232346751.

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

It is a junction number, because it is equal to n+sod(n) for n = 157643193 and 157643202.

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 3 ways as a sum of consecutive naturals, for example, 820963 + ... + 821154.

It is an arithmetic number, because the mean of its divisors is an integer number (17242239).

Almost surely, 2^157643232 is an apocalyptic number.

157643232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157643232 is an abundant number, since it is smaller than the sum of its proper divisors (256170504).

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

157643232 is a wasteful number, since it uses less digits than its factorization.

157643232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642130 (or 1642122 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 157643232 is about 12555.6056006869. The cubic root of 157643232 is about 540.2048057155.

Adding to 157643232 its reverse (232346751), we get a palindrome (389989983).

The spelling of 157643232 in words is "one hundred fifty-seven million, six hundred forty-three thousand, two hundred thirty-two".