157291217323 has 2 divisors, whose sum is σ = 157291217324. Its totient is φ = 157291217322.

The previous prime is 157291217267. The next prime is 157291217329. The reversal of 157291217323 is 323712192751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157291217323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157291217323.

It is not a weakly prime, because it can be changed into another prime (157291217329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78645608661 + 78645608662.

It is an arithmetic number, because the mean of its divisors is an integer number (78645608662).

Almost surely, 2^157291217323 is an apocalyptic number.

157291217323 is a deficient number, since it is larger than the sum of its proper divisors (1).

157291217323 is an equidigital number, since it uses as much as digits as its factorization.

157291217323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The spelling of 157291217323 in words is "one hundred fifty-seven billion, two hundred ninety-one million, two hundred seventeen thousand, three hundred twenty-three".