65425251 has 4 divisors (see below), whose sum is σ = 87233672. Its totient is φ = 43616832.

The previous prime is 65425223. The next prime is 65425273. The reversal of 65425251 is 15252456.

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

It is not a de Polignac number, because 65425251 - 2⁵ = 65425219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65425201) 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, 10904206 + ... + 10904211.

It is an arithmetic number, because the mean of its divisors is an integer number (21808418).

Almost surely, 2^65425251 is an apocalyptic number.

65425251 is a deficient number, since it is larger than the sum of its proper divisors (21808421).

65425251 is a wasteful number, since it uses less digits than its factorization.

65425251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21808420.

The product of its digits is 12000, while the sum is 30.

The square root of 65425251 is about 8088.5877011998. The cubic root of 65425251 is about 402.9475001752.

The spelling of 65425251 in words is "sixty-five million, four hundred twenty-five thousand, two hundred fifty-one".