55391150 has 12 divisors (see below), whose sum is σ = 103027632. Its totient is φ = 22156440.

The previous prime is 55391143. The next prime is 55391173. The reversal of 55391150 is 5119355.

It is a happy number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 553862 + ... + 553961.

It is an arithmetic number, because the mean of its divisors is an integer number (8585636).

Almost surely, 2^55391150 is an apocalyptic number.

55391150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55391150 is a deficient number, since it is larger than the sum of its proper divisors (47636482).

55391150 is a wasteful number, since it uses less digits than its factorization.

55391150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107835 (or 1107830 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 55391150 is about 7442.5230936827. The cubic root of 55391150 is about 381.1946475225.

The spelling of 55391150 in words is "fifty-five million, three hundred ninety-one thousand, one hundred fifty".