90551251 has 8 divisors (see below), whose sum is σ = 103580000. Its totient is φ = 77545728.

The previous prime is 90551243. The next prime is 90551273. The reversal of 90551251 is 15215509.

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

It is a cyclic number.

It is not a de Polignac number, because 90551251 - 2³ = 90551243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90551221) 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, 3565 + ... + 13921.

It is an arithmetic number, because the mean of its divisors is an integer number (12947500).

Almost surely, 2^90551251 is an apocalyptic number.

90551251 is a deficient number, since it is larger than the sum of its proper divisors (13028749).

90551251 is a wasteful number, since it uses less digits than its factorization.

90551251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11613.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 90551251 is about 9515.8421067187. The cubic root of 90551251 is about 449.0535680785.

The spelling of 90551251 in words is "ninety million, five hundred fifty-one thousand, two hundred fifty-one".