31043311152013 has 16 divisors (see below), whose sum is σ = 32906938153536. Its totient is φ = 29183870580480.

The previous prime is 31043311151947. The next prime is 31043311152031. The reversal of 31043311152013 is 31025111334013.

It is a happy number.

It is not a de Polignac number, because 31043311152013 - 2³³ = 31034721217421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31043311152043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70382395 + ... + 70822087.

It is an arithmetic number, because the mean of its divisors is an integer number (2056683634596).

Almost surely, 2^{31043311152013} is an apocalyptic number.

It is an amenable number.

31043311152013 is a deficient number, since it is larger than the sum of its proper divisors (1863627001523).

31043311152013 is a wasteful number, since it uses less digits than its factorization.

31043311152013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444444.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 31043311152013 its reverse (31025111334013), we get a palindrome (62068422486026).

The spelling of 31043311152013 in words is "thirty-one trillion, forty-three billion, three hundred eleven million, one hundred fifty-two thousand, thirteen".