251563222023 has 8 divisors (see below), whose sum is σ = 336611287536. Its totient is φ = 167111985600.

The previous prime is 251563221991. The next prime is 251563222051. The reversal of 251563222023 is 320222365152.

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

It is not a de Polignac number, because 251563222023 - 2⁵ = 251563221991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251563222123) 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, 149206288 + ... + 149207973.

It is an arithmetic number, because the mean of its divisors is an integer number (42076410942).

Almost surely, 2^251563222023 is an apocalyptic number.

251563222023 is a deficient number, since it is larger than the sum of its proper divisors (85048065513).

251563222023 is a wasteful number, since it uses less digits than its factorization.

251563222023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298414545.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 251563222023 its reverse (320222365152), we get a palindrome (571785587175).

The spelling of 251563222023 in words is "two hundred fifty-one billion, five hundred sixty-three million, two hundred twenty-two thousand, twenty-three".