30551239157 has 2 divisors, whose sum is σ = 30551239158. Its totient is φ = 30551239156.

The previous prime is 30551239141. The next prime is 30551239171. The reversal of 30551239157 is 75193215503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28857175876 + 1694063281 = 169874^2 + 41159^2 .

It is a cyclic number.

It is not a de Polignac number, because 30551239157 - 2⁴ = 30551239141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30551239127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15275619578 + 15275619579.

It is an arithmetic number, because the mean of its divisors is an integer number (15275619579).

Almost surely, 2^30551239157 is an apocalyptic number.

It is an amenable number.

30551239157 is a deficient number, since it is larger than the sum of its proper divisors (1).

30551239157 is an equidigital number, since it uses as much as digits as its factorization.

30551239157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 41.

The spelling of 30551239157 in words is "thirty billion, five hundred fifty-one million, two hundred thirty-nine thousand, one hundred fifty-seven".