251134402241 has 4 divisors (see below), whose sum is σ = 251158428612. Its totient is φ = 251110375872.

The previous prime is 251134402231. The next prime is 251134402301. The reversal of 251134402241 is 142204431152.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 162815478016 + 88318924225 = 403504^2 + 297185^2 .

It is a cyclic number.

It is not a de Polignac number, because 251134402241 - 2³⁰ = 250060660417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (251134402231) 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, 11997500 + ... + 12018413.

It is an arithmetic number, because the mean of its divisors is an integer number (62789607153).

Almost surely, 2^251134402241 is an apocalyptic number.

It is an amenable number.

251134402241 is a deficient number, since it is larger than the sum of its proper divisors (24026371).

251134402241 is a wasteful number, since it uses less digits than its factorization.

251134402241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24026370.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 251134402241 its reverse (142204431152), we get a palindrome (393338833393).

The spelling of 251134402241 in words is "two hundred fifty-one billion, one hundred thirty-four million, four hundred two thousand, two hundred forty-one".