20152505231 has 2 divisors, whose sum is σ = 20152505232. Its totient is φ = 20152505230.

The previous prime is 20152505209. The next prime is 20152505299. The reversal of 20152505231 is 13250525102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20152505231 is a prime.

It is a super-2 number, since 2×20152505231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20152505231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20152505831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10076252615 + 10076252616.

It is an arithmetic number, because the mean of its divisors is an integer number (10076252616).

Almost surely, 2^20152505231 is an apocalyptic number.

20152505231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20152505231 is an equidigital number, since it uses as much as digits as its factorization.

20152505231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 26.

It can be divided in two parts, 20 and 152505231, that added together give a palindrome (152505251).

The spelling of 20152505231 in words is "twenty billion, one hundred fifty-two million, five hundred five thousand, two hundred thirty-one".