1641653231 has 8 divisors (see below), whose sum is σ = 1651584000. Its totient is φ = 1631751480.

The previous prime is 1641653207. The next prime is 1641653261. The reversal of 1641653231 is 1323561461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641653231 is a prime.

It is a super-2 number, since 2×1641653231² = 5390050661705478722, 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 (1641653261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112070 + ... + 125868.

It is an arithmetic number, because the mean of its divisors is an integer number (206448000).

Almost surely, 2^1641653231 is an apocalyptic number.

1641653231 is a deficient number, since it is larger than the sum of its proper divisors (9930769).

1641653231 is a wasteful number, since it uses less digits than its factorization.

1641653231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14509.

The product of its digits is 12960, while the sum is 32.

The square root of 1641653231 is about 40517.3201359616. The cubic root of 1641653231 is about 1179.6698374869.

The spelling of 1641653231 in words is "one billion, six hundred forty-one million, six hundred fifty-three thousand, two hundred thirty-one".