2154125626 has 12 divisors (see below), whose sum is σ = 3346453422. Its totient is φ = 1039921904.

The previous prime is 2154125621. The next prime is 2154125653. The reversal of 2154125626 is 6265214512.

It can be written as a sum of positive squares in 3 ways, for example, as 2048015025 + 106110601 = 45255^2 + 10301^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2154125591 and 2154125600.

It is not an unprimeable number, because it can be changed into a prime (2154125621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 638665 + ... + 642028.

Almost surely, 2^2154125626 is an apocalyptic number.

2154125626 is a deficient number, since it is larger than the sum of its proper divisors (1192327796).

2154125626 is a wasteful number, since it uses less digits than its factorization.

2154125626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280753 (or 1280724 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 2154125626 is about 46412.5589253598. The cubic root of 2154125626 is about 1291.4879023883.

The spelling of 2154125626 in words is "two billion, one hundred fifty-four million, one hundred twenty-five thousand, six hundred twenty-six".