65055257 has 4 divisors (see below), whose sum is σ = 65174736. Its totient is φ = 64935780.

The previous prime is 65055253. The next prime is 65055269. The reversal of 65055257 is 75255056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65055257 - 2² = 65055253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65055253) 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, 58919 + ... + 60012.

It is an arithmetic number, because the mean of its divisors is an integer number (16293684).

Almost surely, 2^65055257 is an apocalyptic number.

It is an amenable number.

65055257 is a deficient number, since it is larger than the sum of its proper divisors (119479).

65055257 is a wasteful number, since it uses less digits than its factorization.

65055257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119478.

The product of its (nonzero) digits is 52500, while the sum is 35.

The square root of 65055257 is about 8065.6839139654. The cubic root of 65055257 is about 402.1864785850.

It can be divided in two parts, 650 and 55257, that multiplied together give a triangular number (35917050 = T₈₄₇₅).

The spelling of 65055257 in words is "sixty-five million, fifty-five thousand, two hundred fifty-seven".