2551321125 has 64 divisors (see below), whose sum is σ = 4844835840. Its totient is φ = 1323864000.

The previous prime is 2551321057. The next prime is 2551321169. The reversal of 2551321125 is 5211231552.

2551321125 is a `hidden beast` number, since 2 + 5 + 513 + 21 + 125 = 666.

It is not a de Polignac number, because 2551321125 - 2¹⁷ = 2551190053 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 114660 + ... + 135090.

It is an arithmetic number, because the mean of its divisors is an integer number (75700560).

Almost surely, 2^2551321125 is an apocalyptic number.

2551321125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2551321125 is a deficient number, since it is larger than the sum of its proper divisors (2293514715).

2551321125 is a wasteful number, since it uses less digits than its factorization.

2551321125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20492 (or 20476 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 2551321125 is about 50510.6040846870. The cubic root of 2551321125 is about 1366.4331042138.

Adding to 2551321125 its reverse (5211231552), we get a palindrome (7762552677).

The spelling of 2551321125 in words is "two billion, five hundred fifty-one million, three hundred twenty-one thousand, one hundred twenty-five".