2194457631 has 12 divisors (see below), whose sum is σ = 3108183432. Its totient is φ = 1376914048.

The previous prime is 2194457621. The next prime is 2194457653. The reversal of 2194457631 is 1367544912.

It is not a de Polignac number, because 2194457631 - 2⁶ = 2194457567 is a prime.

It is a super-2 number, since 2×2194457631² = 9631288588508264322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194457621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1264680 + ... + 1266413.

It is an arithmetic number, because the mean of its divisors is an integer number (259015286).

Almost surely, 2^2194457631 is an apocalyptic number.

2194457631 is a deficient number, since it is larger than the sum of its proper divisors (913725801).

2194457631 is a wasteful number, since it uses less digits than its factorization.

2194457631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531130 (or 2531113 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 2194457631 is about 46845.0384886169. The cubic root of 2194457631 is about 1299.4983529965.

The spelling of 2194457631 in words is "two billion, one hundred ninety-four million, four hundred fifty-seven thousand, six hundred thirty-one".