1631253161 has 8 divisors (see below), whose sum is σ = 1697613120. Its totient is φ = 1565567248.

The previous prime is 1631253149. The next prime is 1631253179. The reversal of 1631253161 is 1613521361.

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

It is a cyclic number.

It is not a de Polignac number, because 1631253161 - 2⁶ = 1631253097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631253131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163571 + ... + 173256.

It is an arithmetic number, because the mean of its divisors is an integer number (212201640).

Almost surely, 2^1631253161 is an apocalyptic number.

It is an amenable number.

1631253161 is a deficient number, since it is larger than the sum of its proper divisors (66359959).

1631253161 is a wasteful number, since it uses less digits than its factorization.

1631253161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337023.

The product of its digits is 3240, while the sum is 29.

The square root of 1631253161 is about 40388.7751856874. The cubic root of 1631253161 is about 1177.1734417781.

The spelling of 1631253161 in words is "one billion, six hundred thirty-one million, two hundred fifty-three thousand, one hundred sixty-one".