2656401331 has 2 divisors, whose sum is σ = 2656401332. Its totient is φ = 2656401330.

The previous prime is 2656401301. The next prime is 2656401373. The reversal of 2656401331 is 1331046562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2656401331 - 2¹⁷ = 2656270259 is a prime.

It is a super-2 number, since 2×2656401331² = 14112936062677143122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2656401293 and 2656401302.

It is not a weakly prime, because it can be changed into another prime (2656401301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328200665 + 1328200666.

It is an arithmetic number, because the mean of its divisors is an integer number (1328200666).

Almost surely, 2^2656401331 is an apocalyptic number.

2656401331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656401331 is an equidigital number, since it uses as much as digits as its factorization.

2656401331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 2656401331 is about 51540.2884256578. The cubic root of 2656401331 is about 1384.9408639880.

Adding to 2656401331 its reverse (1331046562), we get a palindrome (3987447893).

The spelling of 2656401331 in words is "two billion, six hundred fifty-six million, four hundred one thousand, three hundred thirty-one".