2562631381 has 2 divisors, whose sum is σ = 2562631382. Its totient is φ = 2562631380.

The previous prime is 2562631369. The next prime is 2562631417. The reversal of 2562631381 is 1831362652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1884862225 + 677769156 = 43415^2 + 26034^2 .

It is a cyclic number.

It is not a de Polignac number, because 2562631381 - 2⁹ = 2562630869 is a prime.

It is a super-2 number, since 2×2562631381² = 13134159189771934322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2562631381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2562631321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281315690 + 1281315691.

It is an arithmetic number, because the mean of its divisors is an integer number (1281315691).

Almost surely, 2^2562631381 is an apocalyptic number.

It is an amenable number.

2562631381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2562631381 is an equidigital number, since it uses as much as digits as its factorization.

2562631381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 2562631381 is about 50622.4395006799. The cubic root of 2562631381 is about 1368.4493049881.

The spelling of 2562631381 in words is "two billion, five hundred sixty-two million, six hundred thirty-one thousand, three hundred eighty-one".