618056531 has 2 divisors, whose sum is σ = 618056532. Its totient is φ = 618056530.

The previous prime is 618056521. The next prime is 618056557. The reversal of 618056531 is 135650816.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618056531 is a prime.

It is a super-2 number, since 2×618056531² = 763987751023507922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 618056491 and 618056500.

It is not a weakly prime, because it can be changed into another prime (618056521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309028265 + 309028266.

It is an arithmetic number, because the mean of its divisors is an integer number (309028266).

Almost surely, 2^618056531 is an apocalyptic number.

618056531 is a deficient number, since it is larger than the sum of its proper divisors (1).

618056531 is an equidigital number, since it uses as much as digits as its factorization.

618056531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 618056531 is about 24860.7427684693. The cubic root of 618056531 is about 851.8099981694.

The spelling of 618056531 in words is "six hundred eighteen million, fifty-six thousand, five hundred thirty-one".