616031421 has 16 divisors (see below), whose sum is σ = 837304128. Its totient is φ = 402800000.

The previous prime is 616031413. The next prime is 616031441. The reversal of 616031421 is 124130616.

It is a cyclic number.

It is not a de Polignac number, because 616031421 - 2³ = 616031413 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 616031391 and 616031400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616031441) 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, 22921 + ... + 41921.

It is an arithmetic number, because the mean of its divisors is an integer number (52331508).

Almost surely, 2^616031421 is an apocalyptic number.

It is an amenable number.

616031421 is a deficient number, since it is larger than the sum of its proper divisors (221272707).

616031421 is a wasteful number, since it uses less digits than its factorization.

616031421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19212.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 616031421 is about 24819.9802779938. The cubic root of 616031421 is about 850.8786397701.

The spelling of 616031421 in words is "six hundred sixteen million, thirty-one thousand, four hundred twenty-one".