2131125154 has 4 divisors (see below), whose sum is σ = 3196687734. Its totient is φ = 1065562576.

The previous prime is 2131125131. The next prime is 2131125229. The reversal of 2131125154 is 4515211312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1193357025 + 937768129 = 34545^2 + 30623^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532781287 + ... + 532781290.

Almost surely, 2^2131125154 is an apocalyptic number.

2131125154 is a deficient number, since it is larger than the sum of its proper divisors (1065562580).

2131125154 is a wasteful number, since it uses less digits than its factorization.

2131125154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065562579.

The product of its digits is 1200, while the sum is 25.

The square root of 2131125154 is about 46164.1111037568. Note that the first 4 decimals coincide. The cubic root of 2131125154 is about 1286.8748649493.

Adding to 2131125154 its reverse (4515211312), we get a palindrome (6646336466).

The spelling of 2131125154 in words is "two billion, one hundred thirty-one million, one hundred twenty-five thousand, one hundred fifty-four".