204772120031 has 2 divisors, whose sum is σ = 204772120032. Its totient is φ = 204772120030.

The previous prime is 204772120013. The next prime is 204772120037. The reversal of 204772120031 is 130021277402.

Together with previous prime (204772120013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204772120031 - 2¹⁴ = 204772103647 is a prime.

It is a super-2 number, since 2×204772120031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204772119976 and 204772120003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204772120037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102386060015 + 102386060016.

It is an arithmetic number, because the mean of its divisors is an integer number (102386060016).

Almost surely, 2^204772120031 is an apocalyptic number.

204772120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

204772120031 is an equidigital number, since it uses as much as digits as its factorization.

204772120031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 204772120031 its reverse (130021277402), we get a palindrome (334793397433).

The spelling of 204772120031 in words is "two hundred four billion, seven hundred seventy-two million, one hundred twenty thousand, thirty-one".