305231201531 has 2 divisors, whose sum is σ = 305231201532. Its totient is φ = 305231201530.

The previous prime is 305231201507. The next prime is 305231201543. The reversal of 305231201531 is 135102132503.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305231201531 - 2²² = 305227007227 is a prime.

It is a super-2 number, since 2×305231201531² (a number of 24 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 305231201531.

It is not a weakly prime, because it can be changed into another prime (305231201131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152615600765 + 152615600766.

It is an arithmetic number, because the mean of its divisors is an integer number (152615600766).

Almost surely, 2^305231201531 is an apocalyptic number.

305231201531 is a deficient number, since it is larger than the sum of its proper divisors (1).

305231201531 is an equidigital number, since it uses as much as digits as its factorization.

305231201531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 305231201531 in words is "three hundred five billion, two hundred thirty-one million, two hundred one thousand, five hundred thirty-one".