2163215431 has 4 divisors (see below), whose sum is σ = 2329616632. Its totient is φ = 1996814232.

The previous prime is 2163215423. The next prime is 2163215443. The reversal of 2163215431 is 1345123612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2163215431 - 2³ = 2163215423 is a prime.

It is a super-2 number, since 2×2163215431² = 9359002001833031522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2163215431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163215401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83200581 + ... + 83200606.

It is an arithmetic number, because the mean of its divisors is an integer number (582404158).

Almost surely, 2^2163215431 is an apocalyptic number.

2163215431 is a deficient number, since it is larger than the sum of its proper divisors (166401201).

2163215431 is a wasteful number, since it uses less digits than its factorization.

2163215431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166401200.

The product of its digits is 4320, while the sum is 28.

The square root of 2163215431 is about 46510.3798199929. The cubic root of 2163215431 is about 1293.3019252670.

The spelling of 2163215431 in words is "two billion, one hundred sixty-three million, two hundred fifteen thousand, four hundred thirty-one".