90213100 has 36 divisors (see below), whose sum is σ = 202084288. Its totient is φ = 34920000.

The previous prime is 90213073. The next prime is 90213103. The reversal of 90213100 is 131209.

90213100 = T₄₀ + T₄₁ + ... + T₈₁₄.

It is a super-2 number, since 2×90213100² = 16276806823220000, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 11451 + ... + 17650.

Almost surely, 2^90213100 is an apocalyptic number.

It is an amenable number.

90213100 is an abundant number, since it is smaller than the sum of its proper divisors (111871188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90213100 is a wasteful number, since it uses less digits than its factorization.

90213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29146 (or 29139 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 90213100 is about 9498.0576961819. The cubic root of 90213100 is about 448.4938948812.

Adding to 90213100 its reverse (131209), we get a palindrome (90344309).

It can be divided in two parts, 9021 and 3100, that added together give a palindrome (12121).

The spelling of 90213100 in words is "ninety million, two hundred thirteen thousand, one hundred".