251225545325 has 48 divisors (see below), whose sum is σ = 321384596736. Its totient is φ = 194690995200.

The previous prime is 251225545321. The next prime is 251225545391. The reversal of 251225545325 is 523545522152.

It is a happy number.

It is not a de Polignac number, because 251225545325 - 2² = 251225545321 is a prime.

It is a super-2 number, since 2×251225545325² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251225545321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90792092 + ... + 90794858.

It is an arithmetic number, because the mean of its divisors is an integer number (6695512432).

Almost surely, 2^251225545325 is an apocalyptic number.

251225545325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251225545325 is a deficient number, since it is larger than the sum of its proper divisors (70159051411).

251225545325 is a wasteful number, since it uses less digits than its factorization.

251225545325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414 (or 3409 counting only the distinct ones).

The product of its digits is 600000, while the sum is 41.

The spelling of 251225545325 in words is "two hundred fifty-one billion, two hundred twenty-five million, five hundred forty-five thousand, three hundred twenty-five".