65251957 has 8 divisors (see below), whose sum is σ = 66611160. Its totient is φ = 63897600.

The previous prime is 65251939. The next prime is 65251969. The reversal of 65251957 is 75915256.

It can be written as a sum of positive squares in 4 ways, for example, as 34880836 + 30371121 = 5906^2 + 5511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65251957 - 2⁷ = 65251829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65251987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39957 + ... + 41557.

It is an arithmetic number, because the mean of its divisors is an integer number (8326395).

Almost surely, 2^65251957 is an apocalyptic number.

It is an amenable number.

65251957 is a deficient number, since it is larger than the sum of its proper divisors (1359203).

65251957 is a wasteful number, since it uses less digits than its factorization.

65251957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423.

The product of its digits is 94500, while the sum is 40.

The square root of 65251957 is about 8077.8683450524. The cubic root of 65251957 is about 402.5914188654.

The spelling of 65251957 in words is "sixty-five million, two hundred fifty-one thousand, nine hundred fifty-seven".