157155139 has 2 divisors, whose sum is σ = 157155140. Its totient is φ = 157155138.

The previous prime is 157155127. The next prime is 157155149. The reversal of 157155139 is 931551751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157155139 - 2¹³ = 157146947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157155098 and 157155107.

It is not a weakly prime, because it can be changed into another prime (157155149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78577569 + 78577570.

It is an arithmetic number, because the mean of its divisors is an integer number (78577570).

Almost surely, 2^157155139 is an apocalyptic number.

157155139 is a deficient number, since it is larger than the sum of its proper divisors (1).

157155139 is an equidigital number, since it uses as much as digits as its factorization.

157155139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23625, while the sum is 37.

The square root of 157155139 is about 12536.1532776207. The cubic root of 157155139 is about 539.6467042056.

The spelling of 157155139 in words is "one hundred fifty-seven million, one hundred fifty-five thousand, one hundred thirty-nine".