55021502 has 4 divisors (see below), whose sum is σ = 82532256. Its totient is φ = 27510750.

The previous prime is 55021489. The next prime is 55021507. The reversal of 55021502 is 20512055.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13755374 + ... + 13755377.

It is an arithmetic number, because the mean of its divisors is an integer number (20633064).

Almost surely, 2^55021502 is an apocalyptic number.

55021502 is a deficient number, since it is larger than the sum of its proper divisors (27510754).

55021502 is a wasteful number, since it uses less digits than its factorization.

55021502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27510753.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 55021502 is about 7417.6480099827. The cubic root of 55021502 is about 380.3447978520.

Adding to 55021502 its reverse (20512055), we get a palindrome (75533557).

The spelling of 55021502 in words is "fifty-five million, twenty-one thousand, five hundred two".