55212502 has 4 divisors (see below), whose sum is σ = 82818756. Its totient is φ = 27606250.

The previous prime is 55212467. The next prime is 55212523. The reversal of 55212502 is 20521255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20521255 = 5 ⋅4104251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13803124 + ... + 13803127.

It is an arithmetic number, because the mean of its divisors is an integer number (20704689).

Almost surely, 2^55212502 is an apocalyptic number.

55212502 is a deficient number, since it is larger than the sum of its proper divisors (27606254).

55212502 is a wasteful number, since it uses less digits than its factorization.

55212502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27606253.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55212502 is about 7430.5115570868. The cubic root of 55212502 is about 380.7843954352.

Adding to 55212502 its reverse (20521255), we get a palindrome (75733757).

The spelling of 55212502 in words is "fifty-five million, two hundred twelve thousand, five hundred two".