25000051 has 4 divisors (see below), whose sum is σ = 25015104. Its totient is φ = 24985000.

The previous prime is 25000033. The next prime is 25000069. The reversal of 25000051 is 15000052.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25000033) and next prime (25000069).

It is a cyclic number.

It is not a de Polignac number, because 25000051 - 2²¹ = 22902899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24999995 and 25000040.

It is not an unprimeable number, because it can be changed into a prime (25000351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4675 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (6253776).

Almost surely, 2^25000051 is an apocalyptic number.

25000051 is a deficient number, since it is larger than the sum of its proper divisors (15053).

25000051 is a wasteful number, since it uses less digits than its factorization.

25000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15052.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 25000051 is about 5000.0050999974. The cubic root of 25000051 is about 292.4019726544.

Subtracting from 25000051 its reverse (15000052), we obtain a palindrome (9999999).

The spelling of 25000051 in words is "twenty-five million, fifty-one", and thus it is an aban number and an uban number.