157212392 has 8 divisors (see below), whose sum is σ = 294773250. Its totient is φ = 78606192.

The previous prime is 157212361. The next prime is 157212401. The reversal of 157212392 is 293212751.

It can be written as a sum of positive squares in only one way, i.e., 129185956 + 28026436 = 11366^2 + 5294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9825767 + ... + 9825782.

Almost surely, 2^157212392 is an apocalyptic number.

It is an amenable number.

157212392 is a deficient number, since it is larger than the sum of its proper divisors (137560858).

157212392 is a wasteful number, since it uses less digits than its factorization.

157212392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651555 (or 19651551 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 157212392 is about 12538.4365851569. The cubic root of 157212392 is about 539.7122289301.

The spelling of 157212392 in words is "one hundred fifty-seven million, two hundred twelve thousand, three hundred ninety-two".