31012343440 has 40 divisors (see below), whose sum is σ = 77650139448. Its totient is φ = 11450711040.

The previous prime is 31012343423. The next prime is 31012343459. The reversal of 31012343440 is 4434321013.

It can be written as a sum of positive squares in 4 ways, for example, as 1834237584 + 29178105856 = 42828^2 + 170816^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×31012343440³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14908741 + ... + 14910820.

Almost surely, 2^31012343440 is an apocalyptic number.

It is an amenable number.

31012343440 is an abundant number, since it is smaller than the sum of its proper divisors (46637796008).

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

31012343440 is a wasteful number, since it uses less digits than its factorization.

31012343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29819587 (or 29819581 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31012343440 its reverse (4434321013), we get a palindrome (35446664453).

The spelling of 31012343440 in words is "thirty-one billion, twelve million, three hundred forty-three thousand, four hundred forty".