55821470 has 8 divisors (see below), whose sum is σ = 100478664. Its totient is φ = 22328584.

The previous prime is 55821461. The next prime is 55821473. The reversal of 55821470 is 7412855.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55821473) 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, 2791064 + ... + 2791083.

It is an arithmetic number, because the mean of its divisors is an integer number (12559833).

Almost surely, 2^55821470 is an apocalyptic number.

55821470 is a deficient number, since it is larger than the sum of its proper divisors (44657194).

55821470 is a wasteful number, since it uses less digits than its factorization.

55821470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582154.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 55821470 is about 7471.3767138326. The cubic root of 55821470 is about 382.1792375431.

The spelling of 55821470 in words is "fifty-five million, eight hundred twenty-one thousand, four hundred seventy".