254220317251 has 4 divisors (see below), whose sum is σ = 257076725400. Its totient is φ = 251363909104.

The previous prime is 254220317191. The next prime is 254220317317. The reversal of 254220317251 is 152713022452.

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

It is a cyclic number.

It is not a de Polignac number, because 254220317251 - 2¹¹ = 254220315203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254220314251) 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, 1428203941 + ... + 1428204118.

It is an arithmetic number, because the mean of its divisors is an integer number (64269181350).

Almost surely, 2^254220317251 is an apocalyptic number.

254220317251 is a deficient number, since it is larger than the sum of its proper divisors (2856408149).

254220317251 is an equidigital number, since it uses as much as digits as its factorization.

254220317251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856408148.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 254220317251 in words is "two hundred fifty-four billion, two hundred twenty million, three hundred seventeen thousand, two hundred fifty-one".