51315242 has 8 divisors (see below), whose sum is σ = 83970432. Its totient is φ = 23325100.

The previous prime is 51315227. The next prime is 51315281. The reversal of 51315242 is 24251315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166234 + ... + 1166277.

It is an arithmetic number, because the mean of its divisors is an integer number (10496304).

Almost surely, 2^51315242 is an apocalyptic number.

51315242 is a deficient number, since it is larger than the sum of its proper divisors (32655190).

51315242 is a wasteful number, since it uses less digits than its factorization.

51315242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332524.

The product of its digits is 1200, while the sum is 23.

The square root of 51315242 is about 7163.4657813100. The cubic root of 51315242 is about 371.6054947910.

Adding to 51315242 its reverse (24251315), we get a palindrome (75566557).

The spelling of 51315242 in words is "fifty-one million, three hundred fifteen thousand, two hundred forty-two".