251212113255007 has 4 divisors (see below), whose sum is σ = 251224847705376. Its totient is φ = 251199378804640.

The previous prime is 251212113254953. The next prime is 251212113255013. The reversal of 251212113255007 is 700552311212152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251212113255007 is a prime.

It is a super-2 number, since 2×251212113255007² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251212113255097) 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, 6367195594 + ... + 6367235047.

It is an arithmetic number, because the mean of its divisors is an integer number (62806211926344).

Almost surely, 2^{251212113255007} is an apocalyptic number.

251212113255007 is a deficient number, since it is larger than the sum of its proper divisors (12734450369).

251212113255007 is a wasteful number, since it uses less digits than its factorization.

251212113255007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12734450368.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 251212113255007 its reverse (700552311212152), we get a palindrome (951764424467159).

The spelling of 251212113255007 in words is "two hundred fifty-one trillion, two hundred twelve billion, one hundred thirteen million, two hundred fifty-five thousand, seven".