618412131 has 16 divisors (see below), whose sum is σ = 917750400. Its totient is φ = 411561864.

The previous prime is 618412121. The next prime is 618412147. The reversal of 618412131 is 131214816.

It is a happy number.

618412131 is a `hidden beast` number, since 618 + 4 + 12 + 1 + 31 = 666.

It is not a de Polignac number, because 618412131 - 2¹⁹ = 617887843 is a prime.

It is a super-2 number, since 2×618412131² = 764867127535922322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 618412095 and 618412104.

It is not an unprimeable number, because it can be changed into a prime (618412121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3661 + ... + 35358.

It is an arithmetic number, because the mean of its divisors is an integer number (57359400).

Almost surely, 2^618412131 is an apocalyptic number.

618412131 is a deficient number, since it is larger than the sum of its proper divisors (299338269).

618412131 is a wasteful number, since it uses less digits than its factorization.

618412131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39615 (or 39609 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 618412131 is about 24867.8935778646. The cubic root of 618412131 is about 851.9733303495.

Adding to 618412131 its reverse (131214816), we get a palindrome (749626947).

The spelling of 618412131 in words is "six hundred eighteen million, four hundred twelve thousand, one hundred thirty-one".