31011220230 has 16 divisors (see below), whose sum is σ = 74426928624. Its totient is φ = 8269658720.

The previous prime is 31011220223. The next prime is 31011220231. The reversal of 31011220230 is 3202211013.

It is a super-2 number, since 2×31011220230² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516853641 + ... + 516853700.

It is an arithmetic number, because the mean of its divisors is an integer number (4651683039).

Almost surely, 2^31011220230 is an apocalyptic number.

31011220230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31011220230 is an abundant number, since it is smaller than the sum of its proper divisors (43415708394).

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

31011220230 is a wasteful number, since it uses less digits than its factorization.

31011220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033707351.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31011220230 its reverse (3202211013), we get a palindrome (34213431243).

The spelling of 31011220230 in words is "thirty-one billion, eleven million, two hundred twenty thousand, two hundred thirty".