157221508732 has 24 divisors (see below), whose sum is σ = 284257516032. Its totient is φ = 76009441200.

The previous prime is 157221508723. The next prime is 157221508781. The reversal of 157221508732 is 237805122751.

157221508732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400894 + ... + 689317.

It is an arithmetic number, because the mean of its divisors is an integer number (11844063168).

Almost surely, 2^157221508732 is an apocalyptic number.

It is an amenable number.

157221508732 is a deficient number, since it is larger than the sum of its proper divisors (127036007300).

157221508732 is a wasteful number, since it uses less digits than its factorization.

157221508732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091409 (or 1091407 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 157221508732 in words is "one hundred fifty-seven billion, two hundred twenty-one million, five hundred eight thousand, seven hundred thirty-two".