55402 has 4 divisors (see below), whose sum is σ = 83106. Its totient is φ = 27700.

The previous prime is 55399. The next prime is 55411. The reversal of 55402 is 20455.

It is a happy number.

55402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20455 = 5 ⋅4091.

It can be written as a sum of positive squares in only one way, i.e., 48841 + 6561 = 221^2 + 81^2 .

It is a d-powerful number, because it can be written as 5⁵ + 5⁵ + 4⁷ + 0 + 2¹⁵ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13849 + ... + 13852.

2⁵⁵⁴⁰² is an apocalyptic number.

55402 is a deficient number, since it is larger than the sum of its proper divisors (27704).

55402 is a wasteful number, since it uses less digits than its factorization.

55402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27703.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 55402 is about 235.3762944733. The cubic root of 55402 is about 38.1219535324.

Adding to 55402 its reverse (20455), we get a palindrome (75857).

The spelling of 55402 in words is "fifty-five thousand, four hundred two".