31000001022 has 40 divisors (see below), whose sum is σ = 69484934376. Its totient is φ = 10330065648.

The previous prime is 31000001017. The next prime is 31000001027. The reversal of 31000001022 is 22010000013.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31000001017) and next prime (31000001027).

It is a super-2 number, since 2×31000001022² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 31000000995 and 31000001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000001027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 513628 + ... + 570800.

Almost surely, 2^31000001022 is an apocalyptic number.

31000001022 is an abundant number, since it is smaller than the sum of its proper divisors (38484933354).

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

31000001022 is a wasteful number, since it uses less digits than its factorization.

31000001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60534 (or 60525 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 31000001022 its reverse (22010000013), we get a palindrome (53010001035).

The spelling of 31000001022 in words is "thirty-one billion, one thousand, twenty-two".