31424305240 has 32 divisors (see below), whose sum is σ = 70713545760. Its totient is φ = 12568147200.

The previous prime is 31424305193. The next prime is 31424305273. The reversal of 31424305240 is 4250342413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31424305199 and 31424305208.

It is a congruent number.

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, 305605 + ... + 395275.

It is an arithmetic number, because the mean of its divisors is an integer number (2209798305).

Almost surely, 2^31424305240 is an apocalyptic number.

It is an amenable number.

31424305240 is an abundant number, since it is smaller than the sum of its proper divisors (39289240520).

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

31424305240 is a wasteful number, since it uses less digits than its factorization.

31424305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98443 (or 98439 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 31424305240 its reverse (4250342413), we get a palindrome (35674647653).

The spelling of 31424305240 in words is "thirty-one billion, four hundred twenty-four million, three hundred five thousand, two hundred forty".