55251428 has 24 divisors (see below), whose sum is σ = 106831872. Its totient is φ = 24869504.

The previous prime is 55251389. The next prime is 55251433. The reversal of 55251428 is 82415255.

It is a junction number, because it is equal to n+sod(n) for n = 55251394 and 55251403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16100 + ... + 19227.

It is an arithmetic number, because the mean of its divisors is an integer number (4451328).

Almost surely, 2^55251428 is an apocalyptic number.

It is an amenable number.

55251428 is a deficient number, since it is larger than the sum of its proper divisors (51580444).

55251428 is a wasteful number, since it uses less digits than its factorization.

55251428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35371 (or 35369 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 55251428 is about 7433.1304307136. The cubic root of 55251428 is about 380.8738614729.

The spelling of 55251428 in words is "fifty-five million, two hundred fifty-one thousand, four hundred twenty-eight".