251201052025 has 24 divisors (see below), whose sum is σ = 388350304704. Its totient is φ = 156592862400.

The previous prime is 251201051957. The next prime is 251201052101. The reversal of 251201052025 is 520250102152.

It is not a de Polignac number, because 251201052025 - 2⁹ = 251201051513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65245102 + ... + 65248951.

It is an arithmetic number, because the mean of its divisors is an integer number (16181262696).

Almost surely, 2^251201052025 is an apocalyptic number.

251201052025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251201052025 is a deficient number, since it is larger than the sum of its proper divisors (137149252679).

251201052025 is a wasteful number, since it uses less digits than its factorization.

251201052025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130494081 (or 130494076 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 251201052025 its reverse (520250102152), we get a palindrome (771451154177).

The spelling of 251201052025 in words is "two hundred fifty-one billion, two hundred one million, fifty-two thousand, twenty-five".