2531637481 has 2 divisors, whose sum is σ = 2531637482. Its totient is φ = 2531637480.

The previous prime is 2531637457. The next prime is 2531637497. The reversal of 2531637481 is 1847361352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1417146025 + 1114491456 = 37645^2 + 33384^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531637481 - 2¹⁷ = 2531506409 is a prime.

It is a super-2 number, since 2×2531637481² = 12818376670408050722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2531637401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265818740 + 1265818741.

It is an arithmetic number, because the mean of its divisors is an integer number (1265818741).

Almost surely, 2^2531637481 is an apocalyptic number.

It is an amenable number.

2531637481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531637481 is an equidigital number, since it uses as much as digits as its factorization.

2531637481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 2531637481 is about 50315.3801635246. The cubic root of 2531637481 is about 1362.9099817875.

The spelling of 2531637481 in words is "two billion, five hundred thirty-one million, six hundred thirty-seven thousand, four hundred eighty-one".