51223903 has 4 divisors (see below), whose sum is σ = 51275680. Its totient is φ = 51172128.

The previous prime is 51223901. The next prime is 51223951. The reversal of 51223903 is 30932215.

It is a happy number.

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 51223903 - 2¹ = 51223901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24375 + ... + 26392.

It is an arithmetic number, because the mean of its divisors is an integer number (12818920).

Almost surely, 2^51223903 is an apocalyptic number.

51223903 is a deficient number, since it is larger than the sum of its proper divisors (51777).

51223903 is a wasteful number, since it uses less digits than its factorization.

51223903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51776.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 51223903 is about 7157.0876060029. The cubic root of 51223903 is about 371.3848830624.

It can be divided in two parts, 5122 and 3903, that added together give a square (9025 = 95²).

The spelling of 51223903 in words is "fifty-one million, two hundred twenty-three thousand, nine hundred three".