157212239 has 2 divisors, whose sum is σ = 157212240. Its totient is φ = 157212238.

The previous prime is 157212233. The next prime is 157212269. The reversal of 157212239 is 932212751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157212239 - 2⁸ = 157211983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157212233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78606119 + 78606120.

It is an arithmetic number, because the mean of its divisors is an integer number (78606120).

Almost surely, 2^157212239 is an apocalyptic number.

157212239 is a deficient number, since it is larger than the sum of its proper divisors (1).

157212239 is an equidigital number, since it uses as much as digits as its factorization.

157212239 is an evil number, because the sum of its binary digits is even.

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

The square root of 157212239 is about 12538.4304839162. The cubic root of 157212239 is about 539.7120538464.

The spelling of 157212239 in words is "one hundred fifty-seven million, two hundred twelve thousand, two hundred thirty-nine".