1631122643 has 8 divisors (see below), whose sum is σ = 1642291200. Its totient is φ = 1619977288.

The previous prime is 1631122601. The next prime is 1631122679. The reversal of 1631122643 is 3462211361.

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 1631122643 - 2¹² = 1631118547 is a prime.

It is a super-2 number, since 2×1631122643² = 5321122153014610898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631122693) 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, 149198 + ... + 159756.

It is an arithmetic number, because the mean of its divisors is an integer number (205286400).

Almost surely, 2^1631122643 is an apocalyptic number.

1631122643 is a deficient number, since it is larger than the sum of its proper divisors (11168557).

1631122643 is a wasteful number, since it uses less digits than its factorization.

1631122643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11601.

The product of its digits is 5184, while the sum is 29.

The square root of 1631122643 is about 40387.1593826553. The cubic root of 1631122643 is about 1177.1420453800.

The spelling of 1631122643 in words is "one billion, six hundred thirty-one million, one hundred twenty-two thousand, six hundred forty-three".