31142331461 has 2 divisors, whose sum is σ = 31142331462. Its totient is φ = 31142331460.

The previous prime is 31142331457. The next prime is 31142331469. The reversal of 31142331461 is 16413324113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15849299236 + 15293032225 = 125894^2 + 123665^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142331461 - 2² = 31142331457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31142331469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571165730 + 15571165731.

It is an arithmetic number, because the mean of its divisors is an integer number (15571165731).

Almost surely, 2^31142331461 is an apocalyptic number.

It is an amenable number.

31142331461 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142331461 is an equidigital number, since it uses as much as digits as its factorization.

31142331461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

Adding to 31142331461 its reverse (16413324113), we get a palindrome (47555655574).

The spelling of 31142331461 in words is "thirty-one billion, one hundred forty-two million, three hundred thirty-one thousand, four hundred sixty-one".