6161972231 has 4 divisors (see below), whose sum is σ = 6278235912. Its totient is φ = 6045708552.

The previous prime is 6161972221. The next prime is 6161972237. The reversal of 6161972231 is 1322791616.

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-6161972231 is a prime.

It is a super-2 number, since 2×6161972231² = 75939803551230234722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161972237) 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, 58131761 + ... + 58131866.

It is an arithmetic number, because the mean of its divisors is an integer number (1569558978).

Almost surely, 2^6161972231 is an apocalyptic number.

6161972231 is a deficient number, since it is larger than the sum of its proper divisors (116263681).

6161972231 is a wasteful number, since it uses less digits than its factorization.

6161972231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116263680.

The product of its digits is 27216, while the sum is 38.

The square root of 6161972231 is about 78498.2307507628. The cubic root of 6161972231 is about 1833.3269062658.

The spelling of 6161972231 in words is "six billion, one hundred sixty-one million, nine hundred seventy-two thousand, two hundred thirty-one".