213104420031 has 4 divisors (see below), whose sum is σ = 284139226712. Its totient is φ = 142069613352.

The previous prime is 213104419987. The next prime is 213104420051. The reversal of 213104420031 is 130024401312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213104420031 - 2⁶ = 213104419967 is a prime.

It is a super-2 number, since 2×213104420031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213104420051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35517403336 + ... + 35517403341.

It is an arithmetic number, because the mean of its divisors is an integer number (71034806678).

Almost surely, 2^213104420031 is an apocalyptic number.

213104420031 is a deficient number, since it is larger than the sum of its proper divisors (71034806681).

213104420031 is an equidigital number, since it uses as much as digits as its factorization.

213104420031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71034806680.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 213104420031 its reverse (130024401312), we get a palindrome (343128821343).

The spelling of 213104420031 in words is "two hundred thirteen billion, one hundred four million, four hundred twenty thousand, thirty-one".