485551531 has 2 divisors, whose sum is σ = 485551532. Its totient is φ = 485551530.

The previous prime is 485551511. The next prime is 485551589. The reversal of 485551531 is 135155584.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 485551531 - 2⁵ = 485551499 is a prime.

It is a super-2 number, since 2×485551531² = 471520578512887922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (485551511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242775765 + 242775766.

It is an arithmetic number, because the mean of its divisors is an integer number (242775766).

Almost surely, 2^485551531 is an apocalyptic number.

485551531 is a deficient number, since it is larger than the sum of its proper divisors (1).

485551531 is an equidigital number, since it uses as much as digits as its factorization.

485551531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60000, while the sum is 37.

The square root of 485551531 is about 22035.2338539894. The cubic root of 485551531 is about 785.9805081851.

It can be divided in two parts, 48555 and 1531, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 485551531 in words is "four hundred eighty-five million, five hundred fifty-one thousand, five hundred thirty-one".