31002021030 has 32 divisors (see below), whose sum is σ = 74409560064. Its totient is φ = 8266682336.

The previous prime is 31002021007. The next prime is 31002021047. The reversal of 31002021030 is 3012020013.

It is a happy number.

It is a super-2 number, since 2×31002021030² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31002020997 and 31002021015.

It is a congruent number.

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, 781249 + ... + 819971.

It is an arithmetic number, because the mean of its divisors is an integer number (2325298752).

Almost surely, 2^31002021030 is an apocalyptic number.

31002021030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31002021030 is an abundant number, since it is smaller than the sum of its proper divisors (43407539034).

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

31002021030 is a wasteful number, since it uses less digits than its factorization.

31002021030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65420.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31002021030 its reverse (3012020013), we get a palindrome (34014041043).

The spelling of 31002021030 in words is "thirty-one billion, two million, twenty-one thousand, thirty".