90213143 has 4 divisors (see below), whose sum is σ = 90427848. Its totient is φ = 89998440.

The previous prime is 90213139. The next prime is 90213157. The reversal of 90213143 is 34131209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34131209 = 7 ⋅4875887.

It is a cyclic number.

It is not a de Polignac number, because 90213143 - 2² = 90213139 is a prime.

It is a super-2 number, since 2×90213143² = 16276822339876898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90213103) 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, 106721 + ... + 107562.

It is an arithmetic number, because the mean of its divisors is an integer number (22606962).

Almost surely, 2^90213143 is an apocalyptic number.

90213143 is a deficient number, since it is larger than the sum of its proper divisors (214705).

90213143 is a wasteful number, since it uses less digits than its factorization.

90213143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214704.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 90213143 is about 9498.0599598023. The cubic root of 90213143 is about 448.4939661393.

The spelling of 90213143 in words is "ninety million, two hundred thirteen thousand, one hundred forty-three".