2151205475 has 24 divisors (see below), whose sum is σ = 2757823488. Its totient is φ = 1662861600.

The previous prime is 2151205451. The next prime is 2151205477. The reversal of 2151205475 is 5745021512.

It is not a de Polignac number, because 2151205475 - 2⁸ = 2151205219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2151205477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 608162 + ... + 611688.

It is an arithmetic number, because the mean of its divisors is an integer number (114909312).

Almost surely, 2^2151205475 is an apocalyptic number.

2151205475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2151205475 is a deficient number, since it is larger than the sum of its proper divisors (606618013).

2151205475 is a wasteful number, since it uses less digits than its factorization.

2151205475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355 (or 4350 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 2151205475 is about 46381.0896271314. The cubic root of 2151205475 is about 1290.9040544947.

Adding to 2151205475 its reverse (5745021512), we get a palindrome (7896226987).

The spelling of 2151205475 in words is "two billion, one hundred fifty-one million, two hundred five thousand, four hundred seventy-five".