31240352144 has 10 divisors (see below), whose sum is σ = 60528182310. Its totient is φ = 15620176064.

The previous prime is 31240352137. The next prime is 31240352173. The reversal of 31240352144 is 44125304213.

It can be written as a sum of positive squares in only one way, i.e., 30132793744 + 1107558400 = 173588^2 + 33280^2 .

It is a super-2 number, since 2×31240352144² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976260989 + ... + 976261020.

It is an arithmetic number, because the mean of its divisors is an integer number (6052818231).

Almost surely, 2^31240352144 is an apocalyptic number.

It is an amenable number.

31240352144 is a deficient number, since it is larger than the sum of its proper divisors (29287830166).

31240352144 is a wasteful number, since it uses less digits than its factorization.

31240352144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952522017 (or 1952522011 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 31240352144 its reverse (44125304213), we get a palindrome (75365656357).

The spelling of 31240352144 in words is "thirty-one billion, two hundred forty million, three hundred fifty-two thousand, one hundred forty-four".