90155201 has 4 divisors (see below), whose sum is σ = 90188592. Its totient is φ = 90121812.

The previous prime is 90155167. The next prime is 90155203. The reversal of 90155201 is 10255109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90155201 - 2²⁶ = 23046337 is a prime.

It is a super-3 number, since 3×90155201³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90155203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12251 + ... + 18176.

It is an arithmetic number, because the mean of its divisors is an integer number (22547148).

Almost surely, 2^90155201 is an apocalyptic number.

It is an amenable number.

90155201 is a deficient number, since it is larger than the sum of its proper divisors (33391).

90155201 is a wasteful number, since it uses less digits than its factorization.

90155201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33390.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 90155201 is about 9495.0092680313. The cubic root of 90155201 is about 448.3979261682.

The spelling of 90155201 in words is "ninety million, one hundred fifty-five thousand, two hundred one".