31300003021 has 16 divisors (see below), whose sum is σ = 37865520000. Its totient is φ = 25301037888.

The previous prime is 31300002977. The next prime is 31300003061. The reversal of 31300003021 is 12030000313.

It is not a de Polignac number, because 31300003021 - 2⁹ = 31300002509 is a prime.

It is a super-2 number, since 2×31300003021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31300002992 and 31300003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300003061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1784146 + ... + 1801603.

It is an arithmetic number, because the mean of its divisors is an integer number (2366595000).

Almost surely, 2^31300003021 is an apocalyptic number.

It is an amenable number.

31300003021 is a deficient number, since it is larger than the sum of its proper divisors (6565516979).

31300003021 is a wasteful number, since it uses less digits than its factorization.

31300003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585828.

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 31300003021 its reverse (12030000313), we get a palindrome (43330003334).

The spelling of 31300003021 in words is "thirty-one billion, three hundred million, three thousand, twenty-one".