51421302 has 24 divisors (see below), whose sum is σ = 111547800. Its totient is φ = 17119680.

The previous prime is 51421283. The next prime is 51421303. The reversal of 51421302 is 20312415.

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 (51421303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23449 + ... + 25547.

It is an arithmetic number, because the mean of its divisors is an integer number (4647825).

Almost surely, 2^51421302 is an apocalyptic number.

51421302 is an abundant number, since it is smaller than the sum of its proper divisors (60126498).

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

51421302 is a wasteful number, since it uses less digits than its factorization.

51421302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51421302 is about 7170.8648014030. The cubic root of 51421302 is about 371.8613340269.

Adding to 51421302 its reverse (20312415), we get a palindrome (71733717).

The spelling of 51421302 in words is "fifty-one million, four hundred twenty-one thousand, three hundred two".