90901551 has 24 divisors (see below), whose sum is σ = 134474256. Its totient is φ = 54562560.

The previous prime is 90901511. The next prime is 90901561. The reversal of 90901551 is 15510909.

It is not a de Polignac number, because 90901551 - 2⁷ = 90901423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90901501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18601 + ... + 22973.

It is an arithmetic number, because the mean of its divisors is an integer number (5603094).

Almost surely, 2^90901551 is an apocalyptic number.

90901551 is a deficient number, since it is larger than the sum of its proper divisors (43572705).

90901551 is a wasteful number, since it uses less digits than its factorization.

90901551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443 (or 4430 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 90901551 is about 9534.2304880887. The cubic root of 90901551 is about 449.6318816624.

The spelling of 90901551 in words is "ninety million, nine hundred one thousand, five hundred fifty-one".