90212533 has 8 divisors (see below), whose sum is σ = 94152600. Its totient is φ = 86327808.

The previous prime is 90212531. The next prime is 90212537. The reversal of 90212533 is 33521209.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 529 + 90212004 = 23^2 + 9498^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 90212533 - 2¹ = 90212531 is a prime.

It is a super-2 number, since 2×90212533² = 16276602220552178, 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 = 90212498 and 90212507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90212531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10488 + ... + 17041.

It is an arithmetic number, because the mean of its divisors is an integer number (11769075).

Almost surely, 2^90212533 is an apocalyptic number.

It is an amenable number.

90212533 is a deficient number, since it is larger than the sum of its proper divisors (3940067).

90212533 is a wasteful number, since it uses less digits than its factorization.

90212533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27671.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 90212533 is about 9498.0278479272. The cubic root of 90212533 is about 448.4929552668.

The spelling of 90212533 in words is "ninety million, two hundred twelve thousand, five hundred thirty-three".