55621634 has 4 divisors (see below), whose sum is σ = 83432454. Its totient is φ = 27810816.

The previous prime is 55621627. The next prime is 55621649. The reversal of 55621634 is 43612655.

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., 53071225 + 2550409 = 7285^2 + 1597^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55621634.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13905407 + ... + 13905410.

Almost surely, 2^55621634 is an apocalyptic number.

55621634 is a deficient number, since it is larger than the sum of its proper divisors (27810820).

55621634 is a wasteful number, since it uses less digits than its factorization.

55621634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27810819.

The product of its digits is 21600, while the sum is 32.

The square root of 55621634 is about 7457.9912845216. The cubic root of 55621634 is about 381.7226361182.

The spelling of 55621634 in words is "fifty-five million, six hundred twenty-one thousand, six hundred thirty-four".