90456551 has 4 divisors (see below), whose sum is σ = 90475704. Its totient is φ = 90437400.

The previous prime is 90456533. The next prime is 90456577. The reversal of 90456551 is 15565409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15565409 = 2789 ⋅5581.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90456551 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 (90456581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116 + ... + 13806.

It is an arithmetic number, because the mean of its divisors is an integer number (22618926).

Almost surely, 2^90456551 is an apocalyptic number.

90456551 is a deficient number, since it is larger than the sum of its proper divisors (19153).

90456551 is a wasteful number, since it uses less digits than its factorization.

90456551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19152.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 90456551 is about 9510.8648923218. The cubic root of 90456551 is about 448.8969709190.

It can be divided in two parts, 904565 and 51, that multiplied together give a triangular number (46132815 = T₉₆₀₅).

The spelling of 90456551 in words is "ninety million, four hundred fifty-six thousand, five hundred fifty-one".