90442221502 has 4 divisors (see below), whose sum is σ = 135663332256. Its totient is φ = 45221110750.

The previous prime is 90442221491. The next prime is 90442221517. The reversal of 90442221502 is 20512224409.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×90442221502² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610555374 + ... + 22610555377.

It is an arithmetic number, because the mean of its divisors is an integer number (33915833064).

Almost surely, 2^90442221502 is an apocalyptic number.

90442221502 is a deficient number, since it is larger than the sum of its proper divisors (45221110754).

90442221502 is a wasteful number, since it uses less digits than its factorization.

90442221502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45221110753.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 90442221502 in words is "ninety billion, four hundred forty-two million, two hundred twenty-one thousand, five hundred two".