31424217220 has 48 divisors (see below), whose sum is σ = 72107013888. Its totient is φ = 11408418560.

The previous prime is 31424217193. The next prime is 31424217247. The reversal of 31424217220 is 2271242413.

It is an interprime number because it is at equal distance from previous prime (31424217193) and next prime (31424217247).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19989 + ... + 251491.

It is an arithmetic number, because the mean of its divisors is an integer number (1502229456).

Almost surely, 2^31424217220 is an apocalyptic number.

It is an amenable number.

31424217220 is an abundant number, since it is smaller than the sum of its proper divisors (40682796668).

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

31424217220 is a wasteful number, since it uses less digits than its factorization.

31424217220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232140 (or 232138 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 31424217220 its reverse (2271242413), we get a palindrome (33695459633).

The spelling of 31424217220 in words is "thirty-one billion, four hundred twenty-four million, two hundred seventeen thousand, two hundred twenty".