90050251 has 2 divisors, whose sum is σ = 90050252. Its totient is φ = 90050250.

The previous prime is 90050231. The next prime is 90050273. The reversal of 90050251 is 15205009.

It is an a-pointer prime, because the next prime (90050273) can be obtained adding 90050251 to its sum of digits (22).

It is a weak prime.

It is an emirp because it is prime and its reverse (15205009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90050251 - 2¹⁵ = 90017483 is a prime.

It is not a weakly prime, because it can be changed into another prime (90050201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45025125 + 45025126.

It is an arithmetic number, because the mean of its divisors is an integer number (45025126).

Almost surely, 2^90050251 is an apocalyptic number.

90050251 is a deficient number, since it is larger than the sum of its proper divisors (1).

90050251 is an equidigital number, since it uses as much as digits as its factorization.

90050251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 90050251 is about 9489.4810711651. The cubic root of 90050251 is about 448.2238647190.

The spelling of 90050251 in words is "ninety million, fifty thousand, two hundred fifty-one".