31524402061 has 2 divisors, whose sum is σ = 31524402062. Its totient is φ = 31524402060.

The previous prime is 31524402053. The next prime is 31524402089. The reversal of 31524402061 is 16020442513.

It is an a-pointer prime, because the next prime (31524402089) can be obtained adding 31524402061 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30627100036 + 897302025 = 175006^2 + 29955^2 .

It is a cyclic number.

It is not a de Polignac number, because 31524402061 - 2³ = 31524402053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31524402361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15762201030 + 15762201031.

It is an arithmetic number, because the mean of its divisors is an integer number (15762201031).

Almost surely, 2^31524402061 is an apocalyptic number.

It is an amenable number.

31524402061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31524402061 is an equidigital number, since it uses as much as digits as its factorization.

31524402061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 31524402061 its reverse (16020442513), we get a palindrome (47544844574).

The spelling of 31524402061 in words is "thirty-one billion, five hundred twenty-four million, four hundred two thousand, sixty-one".