90554015 has 4 divisors (see below), whose sum is σ = 108664824. Its totient is φ = 72443208.

The previous prime is 90553999. The next prime is 90554017. The reversal of 90554015 is 51045509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51045509 = 17 ⋅3002677.

It is a cyclic number.

It is not a de Polignac number, because 90554015 - 2⁴ = 90553999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90554017) 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, 9055397 + ... + 9055406.

It is an arithmetic number, because the mean of its divisors is an integer number (27166206).

Almost surely, 2^90554015 is an apocalyptic number.

90554015 is a deficient number, since it is larger than the sum of its proper divisors (18110809).

90554015 is a wasteful number, since it uses less digits than its factorization.

90554015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18110808.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 90554015 is about 9515.9873371080. The cubic root of 90554015 is about 449.0581370249.

The spelling of 90554015 in words is "ninety million, five hundred fifty-four thousand, fifteen".