20160315257 has 2 divisors, whose sum is σ = 20160315258. Its totient is φ = 20160315256.

The previous prime is 20160315193. The next prime is 20160315269. The reversal of 20160315257 is 75251306102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10398084841 + 9762230416 = 101971^2 + 98804^2 .

It is a cyclic number.

It is not a de Polignac number, because 20160315257 - 2⁶ = 20160315193 is a prime.

It is a super-2 number, since 2×20160315257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20160315277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10080157628 + 10080157629.

It is an arithmetic number, because the mean of its divisors is an integer number (10080157629).

Almost surely, 2^20160315257 is an apocalyptic number.

It is an amenable number.

20160315257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20160315257 is an equidigital number, since it uses as much as digits as its factorization.

20160315257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 20160315257 in words is "twenty billion, one hundred sixty million, three hundred fifteen thousand, two hundred fifty-seven".