2151125545 has 16 divisors (see below), whose sum is σ = 2633497920. Its totient is φ = 1686322624.

The previous prime is 2151125521. The next prime is 2151125579. The reversal of 2151125545 is 5455211512.

It is a cyclic number.

It is not a de Polignac number, because 2151125545 - 2⁵ = 2151125513 is a prime.

It is a super-2 number, since 2×2151125545² = 9254682220703094050, which contains 22 as substring.

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, 82014 + ... + 105016.

It is an arithmetic number, because the mean of its divisors is an integer number (164593620).

Almost surely, 2^2151125545 is an apocalyptic number.

It is an amenable number.

2151125545 is a deficient number, since it is larger than the sum of its proper divisors (482372375).

2151125545 is a wasteful number, since it uses less digits than its factorization.

2151125545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23384.

The product of its digits is 10000, while the sum is 31.

The square root of 2151125545 is about 46380.2279532992. The cubic root of 2151125545 is about 1290.8880660578. Note that the first 3 decimals are identical.

The spelling of 2151125545 in words is "two billion, one hundred fifty-one million, one hundred twenty-five thousand, five hundred forty-five".