2215431 has 16 divisors (see below), whose sum is σ = 3325920. Its totient is φ = 1475496.

The previous prime is 2215417. The next prime is 2215463. The reversal of 2215431 is 1345122.

It is not a de Polignac number, because 2215431 - 2⁵ = 2215399 is a prime.

It is a super-2 number, since 2×2215431² = 9816269031522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 2693.

It is an arithmetic number, because the mean of its divisors is an integer number (207870).

2^2215431 is an apocalyptic number.

2215431 is a deficient number, since it is larger than the sum of its proper divisors (1110489).

2215431 is an frugal number, since it uses more digits than its factorization.

2215431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1016 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2215431 is about 1488.4323968525. The cubic root of 2215431 is about 130.3625187106.

The spelling of 2215431 in words is "two million, two hundred fifteen thousand, four hundred thirty-one".