55157774 has 8 divisors (see below), whose sum is σ = 94556208. Its totient is φ = 23639040.

The previous prime is 55157761. The next prime is 55157783. The reversal of 55157774 is 47775155.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969907 + ... + 1969934.

It is an arithmetic number, because the mean of its divisors is an integer number (11819526).

Almost surely, 2^55157774 is an apocalyptic number.

55157774 is a deficient number, since it is larger than the sum of its proper divisors (39398434).

55157774 is a wasteful number, since it uses less digits than its factorization.

55157774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939850.

The product of its digits is 171500, while the sum is 41.

The square root of 55157774 is about 7426.8279904681. The cubic root of 55157774 is about 380.6585395330.

The spelling of 55157774 in words is "fifty-five million, one hundred fifty-seven thousand, seven hundred seventy-four".