2215145431 has 4 divisors (see below), whose sum is σ = 2215635664. Its totient is φ = 2214655200.

The previous prime is 2215145411. The next prime is 2215145437. The reversal of 2215145431 is 1345415122.

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 2215145431 - 2²⁹ = 1678274519 is a prime.

It is a super-2 number, since 2×2215145431² = 9813738560960351522, 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 2215145431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215145437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238275 + ... + 247396.

It is an arithmetic number, because the mean of its divisors is an integer number (553908916).

Almost surely, 2^2215145431 is an apocalyptic number.

2215145431 is a deficient number, since it is larger than the sum of its proper divisors (490233).

2215145431 is an equidigital number, since it uses as much as digits as its factorization.

2215145431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490232.

The product of its digits is 4800, while the sum is 28.

The square root of 2215145431 is about 47065.3315190704. The cubic root of 2215145431 is about 1303.5691722817.

The spelling of 2215145431 in words is "two billion, two hundred fifteen million, one hundred forty-five thousand, four hundred thirty-one".