90815043 has 16 divisors (see below), whose sum is σ = 132768000. Its totient is φ = 54758880.

The previous prime is 90815009. The next prime is 90815069. The reversal of 90815043 is 34051809.

It is not a de Polignac number, because 90815043 - 2¹⁸ = 90552899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90815043.

It is not an unprimeable number, because it can be changed into a prime (90815093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (8298000).

Almost surely, 2^90815043 is an apocalyptic number.

90815043 is a deficient number, since it is larger than the sum of its proper divisors (41952957).

90815043 is a wasteful number, since it uses less digits than its factorization.

90815043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14042.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90815043 is about 9529.6927022858. The cubic root of 90815043 is about 449.4892031278.

It can be divided in two parts, 908 and 15043, that added together give a palindrome (15951).

The spelling of 90815043 in words is "ninety million, eight hundred fifteen thousand, forty-three".