68231220 has 48 divisors (see below), whose sum is σ = 192144960. Its totient is φ = 18090496.

The previous prime is 68231209. The next prime is 68231231. The reversal of 68231220 is 2213286.

It is an interprime number because it is at equal distance from previous prime (68231209) and next prime (68231231).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7564 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (4003020).

Almost surely, 2^68231220 is an apocalyptic number.

68231220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68231220 is an abundant number, since it is smaller than the sum of its proper divisors (123913740).

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

68231220 is a wasteful number, since it uses less digits than its factorization.

68231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544 (or 6542 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 68231220 is about 8260.2191254228. The cubic root of 68231220 is about 408.6276144178.

The spelling of 68231220 in words is "sixty-eight million, two hundred thirty-one thousand, two hundred twenty".