90421151 has 4 divisors (see below), whose sum is σ = 90542304. Its totient is φ = 90300000.

The previous prime is 90421139. The next prime is 90421157. The reversal of 90421151 is 15112409.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15112409 = 13 ⋅1162493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90421151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90421157) 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, 59450 + ... + 60951.

It is an arithmetic number, because the mean of its divisors is an integer number (22635576).

Almost surely, 2^90421151 is an apocalyptic number.

90421151 is a deficient number, since it is larger than the sum of its proper divisors (121153).

90421151 is a wasteful number, since it uses less digits than its factorization.

90421151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121152.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 90421151 is about 9509.0036807228. The cubic root of 90421151 is about 448.8384049518.

The spelling of 90421151 in words is "ninety million, four hundred twenty-one thousand, one hundred fifty-one".