51223302 has 48 divisors (see below), whose sum is σ = 120032640. Its totient is φ = 15693696.

The previous prime is 51223301. The next prime is 51223313. The reversal of 51223302 is 20332215.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106699 + ... + 107177.

It is an arithmetic number, because the mean of its divisors is an integer number (2500680).

Almost surely, 2^51223302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51223302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60016320).

51223302 is an abundant number, since it is smaller than the sum of its proper divisors (68809338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51223302 is a wasteful number, since it uses less digits than its factorization.

51223302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51223302 is about 7157.0456195277. The cubic root of 51223302 is about 371.3834305947.

Adding to 51223302 its reverse (20332215), we get a palindrome (71555517).

The spelling of 51223302 in words is "fifty-one million, two hundred twenty-three thousand, three hundred two".