31220433402213 has 16 divisors (see below), whose sum is σ = 45411691608576. Its totient is φ = 18921411408240.

The previous prime is 31220433402161. The next prime is 31220433402233.

It is a happy number.

31220433402213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31220433402213 - 2²² = 31220429207909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220433402233) 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, 9593320 + ... + 12428702.

It is an arithmetic number, because the mean of its divisors is an integer number (2838230725536).

Almost surely, 2^{31220433402213} is an apocalyptic number.

31220433402213 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31220433402213 is a deficient number, since it is larger than the sum of its proper divisors (14191258206363).

31220433402213 is a wasteful number, since it uses less digits than its factorization.

31220433402213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169064.

The product of its (nonzero) digits is 20736, while the sum is 30.

It can be divided in two parts, 3122043 and 3402213, that added together give a palindrome (6524256).

The spelling of 31220433402213 in words is "thirty-one trillion, two hundred twenty billion, four hundred thirty-three million, four hundred two thousand, two hundred thirteen".