31142402563 has 2 divisors, whose sum is σ = 31142402564. Its totient is φ = 31142402562.

The previous prime is 31142402509. The next prime is 31142402573. The reversal of 31142402563 is 36520424113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31142402563 is a prime.

It is not a weakly prime, because it can be changed into another prime (31142402573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571201281 + 15571201282.

It is an arithmetic number, because the mean of its divisors is an integer number (15571201282).

Almost surely, 2^31142402563 is an apocalyptic number.

31142402563 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142402563 is an equidigital number, since it uses as much as digits as its factorization.

31142402563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 31142402563 its reverse (36520424113), we get a palindrome (67662826676).

The spelling of 31142402563 in words is "thirty-one billion, one hundred forty-two million, four hundred two thousand, five hundred sixty-three".