55919487 has 8 divisors (see below), whose sum is σ = 80294704. Its totient is φ = 34411968.

The previous prime is 55919483. The next prime is 55919491. The reversal of 55919487 is 78491955.

It is an interprime number because it is at equal distance from previous prime (55919483) and next prime (55919491).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55919487 - 2² = 55919483 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 (55919483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716878 + ... + 716955.

It is an arithmetic number, because the mean of its divisors is an integer number (10036838).

Almost surely, 2^55919487 is an apocalyptic number.

55919487 is a deficient number, since it is larger than the sum of its proper divisors (24375217).

55919487 is a wasteful number, since it uses less digits than its factorization.

55919487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433849.

The product of its digits is 453600, while the sum is 48.

The square root of 55919487 is about 7477.9333374937. The cubic root of 55919487 is about 382.4027964372.

It can be divided in two parts, 5591948 and 7, that added together give a palindrome (5591955).

The spelling of 55919487 in words is "fifty-five million, nine hundred nineteen thousand, four hundred eighty-seven".