31144431130 has 32 divisors (see below), whose sum is σ = 56756536704. Its totient is φ = 12303093696.

The previous prime is 31144431127. The next prime is 31144431133. The reversal of 31144431130 is 3113444113.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31144431127) and next prime (31144431133).

It is a super-2 number, since 2×31144431130² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31144431095 and 31144431104.

It is not an unprimeable number, because it can be changed into a prime (31144431133) 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, 3001912 + ... + 3012268.

It is an arithmetic number, because the mean of its divisors is an integer number (1773641772).

Almost surely, 2^31144431130 is an apocalyptic number.

31144431130 is a deficient number, since it is larger than the sum of its proper divisors (25612105574).

31144431130 is a wasteful number, since it uses less digits than its factorization.

31144431130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14070.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31144431130 its reverse (3113444113), we get a palindrome (34257875243).

The spelling of 31144431130 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty-one thousand, one hundred thirty".