2142256636 has 48 divisors (see below), whose sum is σ = 4165874944. Its totient is φ = 957505536.

The previous prime is 2142256591. The next prime is 2142256693. The reversal of 2142256636 is 6366522412.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 2142256595 and 2142256604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426556 + ... + 431548.

Almost surely, 2^2142256636 is an apocalyptic number.

2142256636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2142256636 is a deficient number, since it is larger than the sum of its proper divisors (2023618308).

2142256636 is a wasteful number, since it uses less digits than its factorization.

2142256636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270 (or 5268 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 2142256636 is about 46284.5183187640. The cubic root of 2142256636 is about 1289.1115481701. Note that the first 3 decimals are identical.

The spelling of 2142256636 in words is "two billion, one hundred forty-two million, two hundred fifty-six thousand, six hundred thirty-six".