618012331 has 4 divisors (see below), whose sum is σ = 618176664. Its totient is φ = 617848000.

The previous prime is 618012293. The next prime is 618012349. The reversal of 618012331 is 133210816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618012331 is a prime.

It is a super-2 number, since 2×618012331² = 763878482536107122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 618012296 and 618012305.

It is not an unprimeable number, because it can be changed into a prime (618012431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76390 + ... + 84091.

It is an arithmetic number, because the mean of its divisors is an integer number (154544166).

Almost surely, 2^618012331 is an apocalyptic number.

618012331 is a deficient number, since it is larger than the sum of its proper divisors (164333).

618012331 is a wasteful number, since it uses less digits than its factorization.

618012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164332.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 618012331 is about 24859.8538008573. The cubic root of 618012331 is about 851.7896920984.

The spelling of 618012331 in words is "six hundred eighteen million, twelve thousand, three hundred thirty-one".