31240103420400 has 120 divisors (see below), whose sum is σ = 114368531028864. Its totient is φ = 7140595065600.

The previous prime is 31240103420363. The next prime is 31240103420543. The reversal of 31240103420400 is 402430104213.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1859521566 + ... + 1859538365.

Almost surely, 2^{31240103420400} is an apocalyptic number.

31240103420400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31240103420400 is an abundant number, since it is smaller than the sum of its proper divisors (83128427608464).

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

31240103420400 is a wasteful number, since it uses less digits than its factorization.

31240103420400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719059959 (or 3719059948 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31240103420400 its reverse (402430104213), we get a palindrome (31642533524613).

The spelling of 31240103420400 in words is "thirty-one trillion, two hundred forty billion, one hundred three million, four hundred twenty thousand, four hundred".