251332006241 has 4 divisors (see below), whose sum is σ = 251418585792. Its totient is φ = 251245426692.

The previous prime is 251332006217. The next prime is 251332006249. The reversal of 251332006241 is 142600233152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251332006241 is a prime.

It is a super-2 number, since 2×251332006241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251332006249) 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, 43285421 + ... + 43291226.

It is an arithmetic number, because the mean of its divisors is an integer number (62854646448).

Almost surely, 2^251332006241 is an apocalyptic number.

It is an amenable number.

251332006241 is a deficient number, since it is larger than the sum of its proper divisors (86579551).

251332006241 is an equidigital number, since it uses as much as digits as its factorization.

251332006241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86579550.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 251332006241 its reverse (142600233152), we get a palindrome (393932239393).

The spelling of 251332006241 in words is "two hundred fifty-one billion, three hundred thirty-two million, six thousand, two hundred forty-one".