2151125505 has 40 divisors (see below), whose sum is σ = 3860252352. Its totient is φ = 1146029472.

The previous prime is 2151125503. The next prime is 2151125513. The reversal of 2151125505 is 5055211512.

2151125505 is a `hidden beast` number, since 2 + 151 + 1 + 2 + 5 + 505 = 666.

It is not a de Polignac number, because 2151125505 - 2¹ = 2151125503 is a prime.

It is a super-3 number, since 3×2151125505³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2151125503) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 468732 + ... + 473298.

Almost surely, 2^2151125505 is an apocalyptic number.

It is an amenable number.

2151125505 is a deficient number, since it is larger than the sum of its proper divisors (1709126847).

2151125505 is a wasteful number, since it uses less digits than its factorization.

2151125505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747 (or 5738 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 2151125505 is about 46380.2275220810. The cubic root of 2151125505 is about 1290.8880580565. Note that the first 3 decimals are identical.

The spelling of 2151125505 in words is "two billion, one hundred fifty-one million, one hundred twenty-five thousand, five hundred five".