55556319 has 32 divisors (see below), whose sum is σ = 92055040. Its totient is φ = 29020032.

The previous prime is 55556317. The next prime is 55556341. The reversal of 55556319 is 91365555.

It is not a de Polignac number, because 55556319 - 2¹ = 55556317 is a prime.

It is a super-2 number, since 2×55556319² = 6173009161659522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556311) 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, 28824 + ... + 30690.

It is an arithmetic number, because the mean of its divisors is an integer number (2876720).

Almost surely, 2^55556319 is an apocalyptic number.

55556319 is a deficient number, since it is larger than the sum of its proper divisors (36498721).

55556319 is a wasteful number, since it uses less digits than its factorization.

55556319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its digits is 101250, while the sum is 39.

The square root of 55556319 is about 7453.6111382336. The cubic root of 55556319 is about 381.5731620279.

The spelling of 55556319 in words is "fifty-five million, five hundred fifty-six thousand, three hundred nineteen".