90221733 has 12 divisors (see below), whose sum is σ = 148937568. Its totient is φ = 51555240.

The previous prime is 90221723. The next prime is 90221743. The reversal of 90221733 is 33712209.

It is an interprime number because it is at equal distance from previous prime (90221723) and next prime (90221743).

It is not a de Polignac number, because 90221733 - 2¹⁰ = 90220709 is a prime.

It is a super-2 number, since 2×90221733² = 16279922211046578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90221697 and 90221706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90221723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715983 + ... + 716108.

It is an arithmetic number, because the mean of its divisors is an integer number (12411464).

Almost surely, 2^90221733 is an apocalyptic number.

It is an amenable number.

90221733 is a deficient number, since it is larger than the sum of its proper divisors (58715835).

90221733 is a wasteful number, since it uses less digits than its factorization.

90221733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432104 (or 1432101 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 90221733 is about 9498.5121466470. The cubic root of 90221733 is about 448.5082007277.

The spelling of 90221733 in words is "ninety million, two hundred twenty-one thousand, seven hundred thirty-three".