51220302 has 32 divisors (see below), whose sum is σ = 117545472. Its totient is φ = 14575584.

The previous prime is 51220291. The next prime is 51220307. The reversal of 51220302 is 20302215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51220307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8728 + ... + 13364.

It is an arithmetic number, because the mean of its divisors is an integer number (3673296).

Almost surely, 2^51220302 is an apocalyptic number.

51220302 is an abundant number, since it is smaller than the sum of its proper divisors (66325170).

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

51220302 is a wasteful number, since it uses less digits than its factorization.

51220302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51220302 is about 7156.8360327731. The cubic root of 51220302 is about 371.3761801703.

Adding to 51220302 its reverse (20302215), we get a palindrome (71522517).

The spelling of 51220302 in words is "fifty-one million, two hundred twenty thousand, three hundred two".