55154399 has 4 divisors (see below), whose sum is σ = 55350960. Its totient is φ = 54957840.

The previous prime is 55154387. The next prime is 55154401. The reversal of 55154399 is 99345155.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55154399 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 (55154329) 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, 97859 + ... + 98420.

It is an arithmetic number, because the mean of its divisors is an integer number (13837740).

Almost surely, 2^55154399 is an apocalyptic number.

55154399 is a deficient number, since it is larger than the sum of its proper divisors (196561).

55154399 is a wasteful number, since it uses less digits than its factorization.

55154399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196560.

The product of its digits is 121500, while the sum is 41.

The square root of 55154399 is about 7426.6007702044. The cubic root of 55154399 is about 380.6507754490.

The spelling of 55154399 in words is "fifty-five million, one hundred fifty-four thousand, three hundred ninety-nine".