31542135451 has 2 divisors, whose sum is σ = 31542135452. Its totient is φ = 31542135450.

The previous prime is 31542135437. The next prime is 31542135497. The reversal of 31542135451 is 15453124513.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31542135451 is a prime.

It is not a weakly prime, because it can be changed into another prime (31542135551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771067725 + 15771067726.

It is an arithmetic number, because the mean of its divisors is an integer number (15771067726).

Almost surely, 2^31542135451 is an apocalyptic number.

31542135451 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542135451 is an equidigital number, since it uses as much as digits as its factorization.

31542135451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 34.

Adding to 31542135451 its reverse (15453124513), we get a palindrome (46995259964).

The spelling of 31542135451 in words is "thirty-one billion, five hundred forty-two million, one hundred thirty-five thousand, four hundred fifty-one".