204220400313031 has 16 divisors (see below), whose sum is σ = 213489329296320. Its totient is φ = 194984183496960.

The previous prime is 204220400313029. The next prime is 204220400313101. The reversal of 204220400313031 is 130313004022402.

It is not a de Polignac number, because 204220400313031 - 2¹ = 204220400313029 is a prime.

It is a super-2 number, since 2×204220400313031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204220400312987 and 204220400313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204220400713031) 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, 36405961 + ... + 41639341.

It is an arithmetic number, because the mean of its divisors is an integer number (13343083081020).

Almost surely, 2^{204220400313031} is an apocalyptic number.

204220400313031 is a deficient number, since it is larger than the sum of its proper divisors (9268928983289).

204220400313031 is a wasteful number, since it uses less digits than its factorization.

204220400313031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236506.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 204220400313031 its reverse (130313004022402), we get a palindrome (334533404335433).

The spelling of 204220400313031 in words is "two hundred four trillion, two hundred twenty billion, four hundred million, three hundred thirteen thousand, thirty-one".