51223045 has 4 divisors (see below), whose sum is σ = 61467660. Its totient is φ = 40978432.

The previous prime is 51223043. The next prime is 51223049. The reversal of 51223045 is 54032215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54032215 = 5 ⋅10806443.

It can be written as a sum of positive squares in 2 ways, for example, as 26152996 + 25070049 = 5114^2 + 5007^2 .

It is a cyclic number.

It is not a de Polignac number, because 51223045 - 2¹ = 51223043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5122300 + ... + 5122309.

It is an arithmetic number, because the mean of its divisors is an integer number (15366915).

Almost surely, 2^51223045 is an apocalyptic number.

It is an amenable number.

51223045 is a deficient number, since it is larger than the sum of its proper divisors (10244615).

51223045 is a wasteful number, since it uses less digits than its factorization.

51223045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244614.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51223045 is about 7157.0276651694. The cubic root of 51223045 is about 371.3828094861.

The spelling of 51223045 in words is "fifty-one million, two hundred twenty-three thousand, forty-five".