55619399 has 8 divisors (see below), whose sum is σ = 62316048. Its totient is φ = 49196160.

The previous prime is 55619381. The next prime is 55619407. The reversal of 55619399 is 99391655.

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

It is a cyclic number.

It is not a de Polignac number, because 55619399 - 2⁸ = 55619143 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 (55619299) 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, 67922 + ... + 68735.

It is an arithmetic number, because the mean of its divisors is an integer number (7789506).

Almost surely, 2^55619399 is an apocalyptic number.

55619399 is a deficient number, since it is larger than the sum of its proper divisors (6696649).

55619399 is a wasteful number, since it uses less digits than its factorization.

55619399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136705.

The product of its digits is 328050, while the sum is 47.

The square root of 55619399 is about 7457.8414437423. The cubic root of 55619399 is about 381.7175232304.

The spelling of 55619399 in words is "fifty-five million, six hundred nineteen thousand, three hundred ninety-nine".