157621132 has 6 divisors (see below), whose sum is σ = 275836988. Its totient is φ = 78810564.

The previous prime is 157621129. The next prime is 157621153. The reversal of 157621132 is 231126751.

It is a happy number.

It is a super-2 number, since 2×157621132² = 49688842505922848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157621132.

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 as a sum of consecutive naturals, namely, 19702638 + ... + 19702645.

Almost surely, 2^157621132 is an apocalyptic number.

It is an amenable number.

157621132 is a deficient number, since it is larger than the sum of its proper divisors (118215856).

157621132 is a wasteful number, since it uses less digits than its factorization.

157621132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39405287 (or 39405285 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 157621132 is about 12554.7254848523. The cubic root of 157621132 is about 540.1795607705.

Adding to 157621132 its reverse (231126751), we get a palindrome (388747883).

The spelling of 157621132 in words is "one hundred fifty-seven million, six hundred twenty-one thousand, one hundred thirty-two".