51123223 has 4 divisors (see below), whose sum is σ = 51257088. Its totient is φ = 50989360.

The previous prime is 51123221. The next prime is 51123253. The reversal of 51123223 is 32232115.

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 51123223 - 2¹ = 51123221 is a prime.

It is a super-2 number, since 2×51123223² = 5227167859815458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51123223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51123221) 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, 66358 + ... + 67123.

It is an arithmetic number, because the mean of its divisors is an integer number (12814272).

Almost surely, 2^51123223 is an apocalyptic number.

51123223 is a deficient number, since it is larger than the sum of its proper divisors (133865).

51123223 is a wasteful number, since it uses less digits than its factorization.

51123223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133864.

The product of its digits is 360, while the sum is 19.

The square root of 51123223 is about 7150.0505592618. The cubic root of 51123223 is about 371.1414058845.

Adding to 51123223 its reverse (32232115), we get a palindrome (83355338).

The spelling of 51123223 in words is "fifty-one million, one hundred twenty-three thousand, two hundred twenty-three".