90203323031 has 4 divisors (see below), whose sum is σ = 90207634752. Its totient is φ = 90199011312.

The previous prime is 90203322959. The next prime is 90203323051. The reversal of 90203323031 is 13032330209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13032330209 = 307 ⋅42450587.

It is a cyclic number.

It is not a de Polignac number, because 90203323031 - 2¹⁴ = 90203306647 is a prime.

It is a super-2 number, since 2×90203323031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90203323051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2124326 + ... + 2166371.

It is an arithmetic number, because the mean of its divisors is an integer number (22551908688).

Almost surely, 2^90203323031 is an apocalyptic number.

90203323031 is a deficient number, since it is larger than the sum of its proper divisors (4311721).

90203323031 is a wasteful number, since it uses less digits than its factorization.

90203323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311720.

The product of its (nonzero) digits is 2916, while the sum is 26.

The spelling of 90203323031 in words is "ninety billion, two hundred three million, three hundred twenty-three thousand, thirty-one".