90214139081 has 4 divisors (see below), whose sum is σ = 98415424464. Its totient is φ = 82012853700.

The previous prime is 90214139011. The next prime is 90214139083. The reversal of 90214139081 is 18093141209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90214139081 is a prime.

It is a super-2 number, since 2×90214139081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90214139083) 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, 4100642675 + ... + 4100642696.

It is an arithmetic number, because the mean of its divisors is an integer number (24603856116).

Almost surely, 2^90214139081 is an apocalyptic number.

It is an amenable number.

90214139081 is a deficient number, since it is larger than the sum of its proper divisors (8201285383).

90214139081 is a wasteful number, since it uses less digits than its factorization.

90214139081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201285382.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 90214139081 in words is "ninety billion, two hundred fourteen million, one hundred thirty-nine thousand, eighty-one".