2031256697 has 2 divisors, whose sum is σ = 2031256698. Its totient is φ = 2031256696.

The previous prime is 2031256663. The next prime is 2031256723. The reversal of 2031256697 is 7966521302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1516012096 + 515244601 = 38936^2 + 22699^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031256697 - 2²² = 2027062393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2031256627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015628348 + 1015628349.

It is an arithmetic number, because the mean of its divisors is an integer number (1015628349).

Almost surely, 2^2031256697 is an apocalyptic number.

It is an amenable number.

2031256697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031256697 is an equidigital number, since it uses as much as digits as its factorization.

2031256697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 2031256697 is about 45069.4652397829. The cubic root of 2031256697 is about 1266.4506465949.

Adding to 2031256697 its reverse (7966521302), we get a palindrome (9997777999).

The spelling of 2031256697 in words is "two billion, thirty-one million, two hundred fifty-six thousand, six hundred ninety-seven".