55193407 has 4 divisors (see below), whose sum is σ = 58440096. Its totient is φ = 51946720.

The previous prime is 55193393. The next prime is 55193419. The reversal of 55193407 is 70439155.

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 55193407 - 2⁷ = 55193279 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 (55193447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623319 + ... + 1623352.

It is an arithmetic number, because the mean of its divisors is an integer number (14610024).

Almost surely, 2^55193407 is an apocalyptic number.

55193407 is a deficient number, since it is larger than the sum of its proper divisors (3246689).

55193407 is a wasteful number, since it uses less digits than its factorization.

55193407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246688.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 55193407 is about 7429.2265411683. The cubic root of 55193407 is about 380.7404928397.

The spelling of 55193407 in words is "fifty-five million, one hundred ninety-three thousand, four hundred seven".