251106425 has 6 divisors (see below), whose sum is σ = 311371998. Its totient is φ = 200885120.

The previous prime is 251106407. The next prime is 251106431. The reversal of 251106425 is 524601152.

It can be written as a sum of positive squares in 3 ways, for example, as 4239481 + 246866944 = 2059^2 + 15712^2 .

It is not a de Polignac number, because 251106425 - 2²⁴ = 234329209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251106394 and 251106403.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5022104 + ... + 5022153.

It is an arithmetic number, because the mean of its divisors is an integer number (51895333).

Almost surely, 2^251106425 is an apocalyptic number.

251106425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251106425 is a deficient number, since it is larger than the sum of its proper divisors (60265573).

251106425 is a wasteful number, since it uses less digits than its factorization.

251106425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10044267 (or 10044262 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 251106425 is about 15846.3379050177. The cubic root of 251106425 is about 630.8884960820. Note that the first 3 decimals are identical.

Adding to 251106425 its reverse (524601152), we get a palindrome (775707577).

The spelling of 251106425 in words is "two hundred fifty-one million, one hundred six thousand, four hundred twenty-five".