251252450215 has 16 divisors (see below), whose sum is σ = 343795209408. Its totient is φ = 174626136576.

The previous prime is 251252450213. The next prime is 251252450261. The reversal of 251252450215 is 512054252152.

It is a cyclic number.

It is not a de Polignac number, because 251252450215 - 2¹ = 251252450213 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 (251252450213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113687787 + ... + 113689996.

It is an arithmetic number, because the mean of its divisors is an integer number (21487200588).

Almost surely, 2^251252450215 is an apocalyptic number.

251252450215 is a deficient number, since it is larger than the sum of its proper divisors (92542759193).

251252450215 is a wasteful number, since it uses less digits than its factorization.

251252450215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227377818.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 251252450215 in words is "two hundred fifty-one billion, two hundred fifty-two million, four hundred fifty thousand, two hundred fifteen".