2151845253 has 18 divisors (see below), whose sum is σ = 3211733382. Its totient is φ = 1388281680.

The previous prime is 2151845243. The next prime is 2151845257. The reversal of 2151845253 is 3525481512.

2151845253 is a `hidden beast` number, since 2 + 1 + 51 + 84 + 525 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2110667364 + 41177889 = 45942^2 + 6417^2 .

It is not a de Polignac number, because 2151845253 - 2⁴ = 2151845237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151845257) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 115750 + ... + 133047.

Almost surely, 2^2151845253 is an apocalyptic number.

It is an amenable number.

2151845253 is a deficient number, since it is larger than the sum of its proper divisors (1059888129).

2151845253 is a wasteful number, since it uses less digits than its factorization.

2151845253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248865 (or 248831 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 2151845253 is about 46387.9860847612. The cubic root of 2151845253 is about 1291.0320153307.

The spelling of 2151845253 in words is "two billion, one hundred fifty-one million, eight hundred forty-five thousand, two hundred fifty-three".