31023302421 has 32 divisors (see below), whose sum is σ = 45365068800. Its totient is φ = 18802506240.

The previous prime is 31023302419. The next prime is 31023302447. The reversal of 31023302421 is 12420332013.

It is not a de Polignac number, because 31023302421 - 2¹ = 31023302419 is a prime.

It is a super-2 number, since 2×31023302421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023302461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55656 + ... + 255233.

It is an arithmetic number, because the mean of its divisors is an integer number (1417658400).

Almost surely, 2^31023302421 is an apocalyptic number.

31023302421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31023302421 is a deficient number, since it is larger than the sum of its proper divisors (14341766379).

31023302421 is a wasteful number, since it uses less digits than its factorization.

31023302421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310989.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31023302421 its reverse (12420332013), we get a palindrome (43443634434).

The spelling of 31023302421 in words is "thirty-one billion, twenty-three million, three hundred two thousand, four hundred twenty-one".