31144004232220 has 48 divisors (see below), whose sum is σ = 71465624875008. Its totient is φ = 11306434916160.

The previous prime is 31144004232217. The next prime is 31144004232241. The reversal of 31144004232220 is 2223240044113.

It is a super-2 number, since 2×31144004232220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116475732 + ... + 116742811.

It is an arithmetic number, because the mean of its divisors is an integer number (1488867184896).

Almost surely, 2^{31144004232220} is an apocalyptic number.

It is an amenable number.

31144004232220 is an abundant number, since it is smaller than the sum of its proper divisors (40321620642788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31144004232220 is a wasteful number, since it uses less digits than its factorization.

31144004232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233219170 (or 233219168 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31144004232220 its reverse (2223240044113), we get a palindrome (33367244276333).

The spelling of 31144004232220 in words is "thirty-one trillion, one hundred forty-four billion, four million, two hundred thirty-two thousand, two hundred twenty".