251324065 has 16 divisors (see below), whose sum is σ = 304704000. Its totient is φ = 198994752.

The previous prime is 251324023. The next prime is 251324081. The reversal of 251324065 is 560423152.

It is a cyclic number.

It is not a de Polignac number, because 251324065 - 2¹¹ = 251322017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227304 + ... + 228406.

It is an arithmetic number, because the mean of its divisors is an integer number (19044000).

Almost surely, 2^251324065 is an apocalyptic number.

It is an amenable number.

251324065 is a deficient number, since it is larger than the sum of its proper divisors (53379935).

251324065 is a wasteful number, since it uses less digits than its factorization.

251324065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 251324065 is about 15853.2036194581. The cubic root of 251324065 is about 631.0707122113.

The spelling of 251324065 in words is "two hundred fifty-one million, three hundred twenty-four thousand, sixty-five".