55573420 has 24 divisors (see below), whose sum is σ = 133376544. Its totient is φ = 19053696.

The previous prime is 55573417. The next prime is 55573429. The reversal of 55573420 is 2437555.

It is not an unprimeable number, because it can be changed into a prime (55573429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198337 + ... + 198616.

It is an arithmetic number, because the mean of its divisors is an integer number (5557356).

Almost surely, 2^55573420 is an apocalyptic number.

It is an amenable number.

55573420 is an abundant number, since it is smaller than the sum of its proper divisors (77803124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55573420 is a wasteful number, since it uses less digits than its factorization.

55573420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396969 (or 396967 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 55573420 is about 7454.7582120415. The cubic root of 55573420 is about 381.6123091693.

The spelling of 55573420 in words is "fifty-five million, five hundred seventy-three thousand, four hundred twenty".