55821634 has 8 divisors (see below), whose sum is σ = 91344528. Its totient is φ = 25373460.

The previous prime is 55821631. The next prime is 55821643. The reversal of 55821634 is 43612855.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55821634.

It is not an unprimeable number, because it can be changed into a prime (55821631) 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, 1268652 + ... + 1268695.

It is an arithmetic number, because the mean of its divisors is an integer number (11418066).

Almost surely, 2^55821634 is an apocalyptic number.

55821634 is a deficient number, since it is larger than the sum of its proper divisors (35522894).

55821634 is a wasteful number, since it uses less digits than its factorization.

55821634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537360.

The product of its digits is 28800, while the sum is 34.

The square root of 55821634 is about 7471.3876890441. The cubic root of 55821634 is about 382.1796118157.

The spelling of 55821634 in words is "fifty-five million, eight hundred twenty-one thousand, six hundred thirty-four".