51302638 has 4 divisors (see below), whose sum is σ = 76953960. Its totient is φ = 25651318.

The previous prime is 51302633. The next prime is 51302659. The reversal of 51302638 is 83620315.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51302633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825658 + ... + 12825661.

It is an arithmetic number, because the mean of its divisors is an integer number (19238490).

Almost surely, 2^51302638 is an apocalyptic number.

51302638 is a deficient number, since it is larger than the sum of its proper divisors (25651322).

51302638 is a wasteful number, since it uses less digits than its factorization.

51302638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651321.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51302638 is about 7162.5859855223. The cubic root of 51302638 is about 371.5750678392.

The spelling of 51302638 in words is "fifty-one million, three hundred two thousand, six hundred thirty-eight".