251129122116551 has 8 divisors (see below), whose sum is σ = 287039302440480. Its totient is φ = 215227589655168.

The previous prime is 251129122116533. The next prime is 251129122116581. The reversal of 251129122116551 is 155611221921152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251129122116551 is a prime.

It is a super-2 number, since 2×251129122116551² (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 (251129122116581) 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, 2161903406 + ... + 2162019563.

It is an arithmetic number, because the mean of its divisors is an integer number (35879912805060).

Almost surely, 2^{251129122116551} is an apocalyptic number.

251129122116551 is a deficient number, since it is larger than the sum of its proper divisors (35910180323929).

251129122116551 is an equidigital number, since it uses as much as digits as its factorization.

251129122116551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323931273.

The product of its digits is 108000, while the sum is 44.

The spelling of 251129122116551 in words is "two hundred fifty-one trillion, one hundred twenty-nine billion, one hundred twenty-two million, one hundred sixteen thousand, five hundred fifty-one".