55404459 has 32 divisors (see below), whose sum is σ = 90478080. Its totient is φ = 33228000.

The previous prime is 55404439. The next prime is 55404463. The reversal of 55404459 is 95440455.

It is not a de Polignac number, because 55404459 - 2⁷ = 55404331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55404439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29074 + ... + 30920.

It is an arithmetic number, because the mean of its divisors is an integer number (2827440).

Almost surely, 2^55404459 is an apocalyptic number.

55404459 is a deficient number, since it is larger than the sum of its proper divisors (35073621).

55404459 is a wasteful number, since it uses less digits than its factorization.

55404459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 55404459 is about 7443.4171588055. The cubic root of 55404459 is about 381.2251753432.

It can be divided in two parts, 5540 and 4459, that added together give a palindrome (9999).

The spelling of 55404459 in words is "fifty-five million, four hundred four thousand, four hundred fifty-nine".