51222403 has 4 divisors (see below), whose sum is σ = 53449488. Its totient is φ = 48995320.

The previous prime is 51222397. The next prime is 51222419. The reversal of 51222403 is 30422215.

51222403 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.

It is a cyclic number.

It is not a de Polignac number, because 51222403 - 2¹³ = 51214211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51222463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113508 + ... + 1113553.

It is an arithmetic number, because the mean of its divisors is an integer number (13362372).

Almost surely, 2^51222403 is an apocalyptic number.

51222403 is a deficient number, since it is larger than the sum of its proper divisors (2227085).

51222403 is a wasteful number, since it uses less digits than its factorization.

51222403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227084.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 51222403 is about 7156.9828140076. The cubic root of 51222403 is about 371.3812579139.

Adding to 51222403 its reverse (30422215), we get a palindrome (81644618).

The spelling of 51222403 in words is "fifty-one million, two hundred twenty-two thousand, four hundred three".