157508431 has 2 divisors, whose sum is σ = 157508432. Its totient is φ = 157508430.

The previous prime is 157508413. The next prime is 157508453. The reversal of 157508431 is 134805751.

It is a happy number.

Together with previous prime (157508413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (134805751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157508431 is a prime.

It is a super-4 number, since 4×157508431⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157508401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78754215 + 78754216.

It is an arithmetic number, because the mean of its divisors is an integer number (78754216).

Almost surely, 2^157508431 is an apocalyptic number.

157508431 is a deficient number, since it is larger than the sum of its proper divisors (1).

157508431 is an equidigital number, since it uses as much as digits as its factorization.

157508431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 157508431 is about 12550.2362925962. The cubic root of 157508431 is about 540.0507851185.

The spelling of 157508431 in words is "one hundred fifty-seven million, five hundred eight thousand, four hundred thirty-one".