55191874 has 4 divisors (see below), whose sum is σ = 82787814. Its totient is φ = 27595936.

The previous prime is 55191847. The next prime is 55191883. The reversal of 55191874 is 47819155.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 44983849 + 10208025 = 6707^2 + 3195^2 .

It is a super-2 number, since 2×55191874² = 6092285911263752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13797967 + ... + 13797970.

Almost surely, 2^55191874 is an apocalyptic number.

55191874 is a deficient number, since it is larger than the sum of its proper divisors (27595940).

55191874 is a wasteful number, since it uses less digits than its factorization.

55191874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27595939.

The product of its digits is 50400, while the sum is 40.

The square root of 55191874 is about 7429.1233668583. The cubic root of 55191874 is about 380.7369677775.

It can be divided in two parts, 55191 and 874, that added together give a palindrome (56065).

The spelling of 55191874 in words is "fifty-five million, one hundred ninety-one thousand, eight hundred seventy-four".