2551385052 has 18 divisors (see below), whose sum is σ = 6449334528. Its totient is φ = 850461672.

The previous prime is 2551385051. The next prime is 2551385069. The reversal of 2551385052 is 2505831552.

2551385052 is a `hidden beast` number, since 2 + 551 + 3 + 8 + 50 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 70871807 = 2551385052 / (2 + 5 + 5 + 1 + 3 + 8 + 5 + 0 + 5 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 2551384998 and 2551385016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551385051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35435868 + ... + 35435939.

Almost surely, 2^2551385052 is an apocalyptic number.

It is an amenable number.

2551385052 is an abundant number, since it is smaller than the sum of its proper divisors (3897949476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551385052 is a wasteful number, since it uses less digits than its factorization.

2551385052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70871817 (or 70871812 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The square root of 2551385052 is about 50511.2368884390. The cubic root of 2551385052 is about 1366.4445167637. Note that the first 3 decimals are identical.

The spelling of 2551385052 in words is "two billion, five hundred fifty-one million, three hundred eighty-five thousand, fifty-two".