31144202040 has 96 divisors (see below), whose sum is σ = 108686929680. Its totient is φ = 7118673408.

The previous prime is 31144202027. The next prime is 31144202057. The reversal of 31144202040 is 4020244113.

It is a super-2 number, since 2×31144202040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31144201998 and 31144202016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2642437 + ... + 2654196.

Almost surely, 2^31144202040 is an apocalyptic number.

31144202040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31144202040 is an abundant number, since it is smaller than the sum of its proper divisors (77542727640).

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

31144202040 is a wasteful number, since it uses less digits than its factorization.

31144202040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296661 (or 5296650 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31144202040 its reverse (4020244113), we get a palindrome (35164446153).

The spelling of 31144202040 in words is "thirty-one billion, one hundred forty-four million, two hundred two thousand, forty".