251136226061 has 16 divisors (see below), whose sum is σ = 293055609600. Its totient is φ = 210774503808.

The previous prime is 251136226013. The next prime is 251136226069. The reversal of 251136226061 is 160622631152.

It is a cyclic number.

It is not a de Polignac number, because 251136226061 - 2¹⁰ = 251136225037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251136226069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1892666 + ... + 2021003.

It is an arithmetic number, because the mean of its divisors is an integer number (18315975600).

Almost surely, 2^251136226061 is an apocalyptic number.

It is an amenable number.

251136226061 is a deficient number, since it is larger than the sum of its proper divisors (41919383539).

251136226061 is a wasteful number, since it uses less digits than its factorization.

251136226061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913868.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 251136226061 in words is "two hundred fifty-one billion, one hundred thirty-six million, two hundred twenty-six thousand, sixty-one".