31004020311 has 16 divisors (see below), whose sum is σ = 45714524160. Its totient is φ = 18532912320.

The previous prime is 31004020301. The next prime is 31004020319. The reversal of 31004020311 is 11302040013.

It is not a de Polignac number, because 31004020311 - 2¹⁸ = 31003758167 is a prime.

It is a super-2 number, since 2×31004020311² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004020319) 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, 6432631 + ... + 6437448.

It is an arithmetic number, because the mean of its divisors is an integer number (2857157760).

Almost surely, 2^31004020311 is an apocalyptic number.

31004020311 is a deficient number, since it is larger than the sum of its proper divisors (14710503849).

31004020311 is a wasteful number, since it uses less digits than its factorization.

31004020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12870166.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31004020311 its reverse (11302040013), we get a palindrome (42306060324).

The spelling of 31004020311 in words is "thirty-one billion, four million, twenty thousand, three hundred eleven".