31423122200 has 24 divisors (see below), whose sum is σ = 73058759580. Its totient is φ = 12569248800.

The previous prime is 31423122191. The next prime is 31423122209. The reversal of 31423122200 is 222132413.

It is an interprime number because it is at equal distance from previous prime (31423122191) and next prime (31423122209).

It is a super-2 number, since 2×31423122200² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423122209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78557606 + ... + 78558005.

Almost surely, 2^31423122200 is an apocalyptic number.

It is an amenable number.

31423122200 is an abundant number, since it is smaller than the sum of its proper divisors (41635637380).

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

31423122200 is a wasteful number, since it uses less digits than its factorization.

31423122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157115627 (or 157115618 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31423122200 its reverse (222132413), we get a palindrome (31645254613).

The spelling of 31423122200 in words is "thirty-one billion, four hundred twenty-three million, one hundred twenty-two thousand, two hundred".