31234520311 has 4 divisors (see below), whose sum is σ = 31305670000. Its totient is φ = 31163370624.

The previous prime is 31234520269. The next prime is 31234520341. The reversal of 31234520311 is 11302543213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31234520311 - 2¹³ = 31234512119 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 (31234520341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35574186 + ... + 35575063.

It is an arithmetic number, because the mean of its divisors is an integer number (7826417500).

Almost surely, 2^31234520311 is an apocalyptic number.

31234520311 is a deficient number, since it is larger than the sum of its proper divisors (71149689).

31234520311 is an equidigital number, since it uses as much as digits as its factorization.

31234520311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71149688.

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 31234520311 in words is "thirty-one billion, two hundred thirty-four million, five hundred twenty thousand, three hundred eleven".