2197431 has 6 divisors (see below), whose sum is σ = 3174080. Its totient is φ = 1464948.

The previous prime is 2197427. The next prime is 2197453. The reversal of 2197431 is 1347912.

It is not a de Polignac number, because 2197431 - 2² = 2197427 is a prime.

It is a super-2 number, since 2×2197431² = 9657405999522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2197395 and 2197404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122071 + ... + 122088.

2^2197431 is an apocalyptic number.

2197431 is a deficient number, since it is larger than the sum of its proper divisors (976649).

2197431 is a wasteful number, since it uses less digits than its factorization.

2197431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244165 (or 244162 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2197431 is about 1482.3734347323. The cubic root of 2197431 is about 130.0085004304.

It can be divided in two parts, 2197 and 431, that added together give a triangular number (2628 = T₇₂).

The spelling of 2197431 in words is "two million, one hundred ninety-seven thousand, four hundred thirty-one".