31204148440 has 64 divisors (see below), whose sum is σ = 70640812800. Its totient is φ = 12405178368.

The previous prime is 31204148429. The next prime is 31204148471. The reversal of 31204148440 is 4484140213.

It is a super-3 number, since 3×31204148440³ (a number of 32 digits) contains 333 as substring.

It is a zygodrome in base 3.

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 15 ways as a sum of consecutive naturals, for example, 4920952 + ... + 4927288.

It is an arithmetic number, because the mean of its divisors is an integer number (1103762700).

Almost surely, 2^31204148440 is an apocalyptic number.

It is an amenable number.

31204148440 is an abundant number, since it is smaller than the sum of its proper divisors (39436664360).

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

31204148440 is a wasteful number, since it uses less digits than its factorization.

31204148440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084 (or 7080 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 31204148440 its reverse (4484140213), we get a palindrome (35688288653).

The spelling of 31204148440 in words is "thirty-one billion, two hundred four million, one hundred forty-eight thousand, four hundred forty".