2145275631 has 8 divisors (see below), whose sum is σ = 3178186160. Its totient is φ = 1430183736.

The previous prime is 2145275621. The next prime is 2145275641. The reversal of 2145275631 is 1365725412.

2145275631 is a `hidden beast` number, since 2 + 14 + 5 + 2 + 7 + 5 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (2145275621) and next prime (2145275641).

It is not a de Polignac number, because 2145275631 - 2²³ = 2136887023 is a prime.

It is a super-2 number, since 2×2145275631² = 9204415065924896322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145275621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39727300 + ... + 39727353.

It is an arithmetic number, because the mean of its divisors is an integer number (397273270).

Almost surely, 2^2145275631 is an apocalyptic number.

2145275631 is a deficient number, since it is larger than the sum of its proper divisors (1032910529).

2145275631 is an equidigital number, since it uses as much as digits as its factorization.

2145275631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79454662 (or 79454656 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 2145275631 is about 46317.1202796547. The cubic root of 2145275631 is about 1289.7168280555.

The spelling of 2145275631 in words is "two billion, one hundred forty-five million, two hundred seventy-five thousand, six hundred thirty-one".