157208431 has 2 divisors, whose sum is σ = 157208432. Its totient is φ = 157208430.

The previous prime is 157208423. The next prime is 157208479. The reversal of 157208431 is 134802751.

It is a weak prime.

It is an emirp because it is prime and its reverse (134802751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157208431 - 2³ = 157208423 is a prime.

It is a super-3 number, since 3×157208431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 157208393 and 157208402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157206431) by changing a digit.

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 as a sum of consecutive naturals, namely, 78604215 + 78604216.

It is an arithmetic number, because the mean of its divisors is an integer number (78604216).

Almost surely, 2^157208431 is an apocalyptic number.

157208431 is a deficient number, since it is larger than the sum of its proper divisors (1).

157208431 is an equidigital number, since it uses as much as digits as its factorization.

157208431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 157208431 is about 12538.2786298598. The cubic root of 157208431 is about 539.7076961702.

The spelling of 157208431 in words is "one hundred fifty-seven million, two hundred eight thousand, four hundred thirty-one".