55488407 has 4 divisors (see below), whose sum is σ = 59756760. Its totient is φ = 51220056.

The previous prime is 55488373. The next prime is 55488409. The reversal of 55488407 is 70488455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55488407 - 2¹⁴ = 55472023 is a prime.

It is a super-2 number, since 2×55488407² = 6157926622795298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55488409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134157 + ... + 2134182.

It is an arithmetic number, because the mean of its divisors is an integer number (14939190).

Almost surely, 2^55488407 is an apocalyptic number.

55488407 is a deficient number, since it is larger than the sum of its proper divisors (4268353).

55488407 is a wasteful number, since it uses less digits than its factorization.

55488407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268352.

The product of its (nonzero) digits is 179200, while the sum is 41.

The square root of 55488407 is about 7449.0541010252. The cubic root of 55488407 is about 381.4176203898.

The spelling of 55488407 in words is "fifty-five million, four hundred eighty-eight thousand, four hundred seven".