31424401040 has 20 divisors (see below), whose sum is σ = 73061732604. Its totient is φ = 12569760384.

The previous prime is 31424401039. The next prime is 31424401109. The reversal of 31424401040 is 4010442413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16850116864 + 14574284176 = 129808^2 + 120724^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 31424400997 and 31424401015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196402427 + ... + 196402586.

Almost surely, 2^31424401040 is an apocalyptic number.

It is an amenable number.

31424401040 is an abundant number, since it is smaller than the sum of its proper divisors (41637331564).

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

31424401040 is a wasteful number, since it uses less digits than its factorization.

31424401040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392805026 (or 392805020 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 31424401040 its reverse (4010442413), we get a palindrome (35434843453).

The spelling of 31424401040 in words is "thirty-one billion, four hundred twenty-four million, four hundred one thousand, forty".