53815489 has 32 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 39094272.

The previous prime is 53815477. The next prime is 53815507. The reversal of 53815489 is 98451835.

It is not a de Polignac number, because 53815489 - 2¹⁵ = 53782721 is a prime.

It is a super-2 number, since 2×53815489² = 5792213712618242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (53815439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66117 + ... + 66925.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^53815489 is an apocalyptic number.

It is an amenable number.

53815489 is a deficient number, since it is larger than the sum of its proper divisors (18034751).

53815489 is a wasteful number, since it uses less digits than its factorization.

53815489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its digits is 172800, while the sum is 43.

The square root of 53815489 is about 7335.9041024266. The cubic root of 53815489 is about 377.5453250257.

The spelling of 53815489 in words is "fifty-three million, eight hundred fifteen thousand, four hundred eighty-nine".