55420506 has 24 divisors (see below), whose sum is σ = 120516084. Its totient is φ = 18406080.

The previous prime is 55420481. The next prime is 55420517. The reversal of 55420506 is 60502455.

It can be written as a sum of positive squares in 2 ways, for example, as 54154881 + 1265625 = 7359^2 + 1125^2 .

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 55420506.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421 + ... + 10536.

Almost surely, 2^55420506 is an apocalyptic number.

55420506 is an abundant number, since it is smaller than the sum of its proper divisors (65095578).

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

55420506 is a wasteful number, since it uses less digits than its factorization.

55420506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11246 (or 11243 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55420506 is about 7444.4950130952. The cubic root of 55420506 is about 381.2619770133.

The spelling of 55420506 in words is "fifty-five million, four hundred twenty thousand, five hundred six".