90145223 has 8 divisors (see below), whose sum is σ = 103138848. Its totient is φ = 77180544.

The previous prime is 90145219. The next prime is 90145229. The reversal of 90145223 is 32254109.

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

It is not a de Polignac number, because 90145223 - 2² = 90145219 is a prime.

It is a super-2 number, since 2×90145223² = 16252322459439458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90145192 and 90145201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90145229) 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, 86 + ... + 13427.

It is an arithmetic number, because the mean of its divisors is an integer number (12892356).

Almost surely, 2^90145223 is an apocalyptic number.

90145223 is a deficient number, since it is larger than the sum of its proper divisors (12993625).

90145223 is a wasteful number, since it uses less digits than its factorization.

90145223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14473.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 90145223 is about 9494.4838195660. The cubic root of 90145223 is about 448.3813832898.

The spelling of 90145223 in words is "ninety million, one hundred forty-five thousand, two hundred twenty-three".