31142402313 has 32 divisors (see below), whose sum is σ = 48023089152. Its totient is φ = 17771659200.

The previous prime is 31142402299. The next prime is 31142402383. The reversal of 31142402313 is 31320424113.

It is a happy number.

It is not a de Polignac number, because 31142402313 - 2⁴ = 31142402297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31142402383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373531 + ... + 449232.

It is an arithmetic number, because the mean of its divisors is an integer number (1500721536).

Almost surely, 2^31142402313 is an apocalyptic number.

31142402313 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31142402313 is a deficient number, since it is larger than the sum of its proper divisors (16880686839).

31142402313 is a wasteful number, since it uses less digits than its factorization.

31142402313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822845.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31142402313 its reverse (31320424113), we get a palindrome (62462826426).

The spelling of 31142402313 in words is "thirty-one billion, one hundred forty-two million, four hundred two thousand, three hundred thirteen".