251155201229 has 2 divisors, whose sum is σ = 251155201230. Its totient is φ = 251155201228.

The previous prime is 251155201201. The next prime is 251155201247. The reversal of 251155201229 is 922102551152.

251155201229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202180626025 + 48974575204 = 449645^2 + 221302^2 .

It is a cyclic number.

It is not a de Polignac number, because 251155201229 - 2²⁰ = 251154152653 is a prime.

It is a super-2 number, since 2×251155201229² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251155201259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125577600614 + 125577600615.

It is an arithmetic number, because the mean of its divisors is an integer number (125577600615).

Almost surely, 2^251155201229 is an apocalyptic number.

It is an amenable number.

251155201229 is a deficient number, since it is larger than the sum of its proper divisors (1).

251155201229 is an equidigital number, since it uses as much as digits as its factorization.

251155201229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 251155201229 in words is "two hundred fifty-one billion, one hundred fifty-five million, two hundred one thousand, two hundred twenty-nine".