2651280391 has 2 divisors, whose sum is σ = 2651280392. Its totient is φ = 2651280390.

The previous prime is 2651280389. The next prime is 2651280419. The reversal of 2651280391 is 1930821562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2651280391 - 2¹ = 2651280389 is a prime.

It is a super-2 number, since 2×2651280391² = 14058575423402225762, which contains 22 as substring.

Together with 2651280389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2651280391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2651280341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325640195 + 1325640196.

It is an arithmetic number, because the mean of its divisors is an integer number (1325640196).

Almost surely, 2^2651280391 is an apocalyptic number.

2651280391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2651280391 is an equidigital number, since it uses as much as digits as its factorization.

2651280391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2651280391 is about 51490.5854598683. The cubic root of 2651280391 is about 1384.0503407505.

The spelling of 2651280391 in words is "two billion, six hundred fifty-one million, two hundred eighty thousand, three hundred ninety-one".