51415242 has 32 divisors (see below), whose sum is σ = 109216512. Its totient is φ = 16080384.

The previous prime is 51415219. The next prime is 51415249. The reversal of 51415242 is 24251415.

It is not an unprimeable number, because it can be changed into a prime (51415249) 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, 46063 + ... + 47165.

It is an arithmetic number, because the mean of its divisors is an integer number (3413016).

Almost surely, 2^51415242 is an apocalyptic number.

51415242 is an abundant number, since it is smaller than the sum of its proper divisors (57801270).

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

51415242 is a wasteful number, since it uses less digits than its factorization.

51415242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582.

The product of its digits is 1600, while the sum is 24.

The square root of 51415242 is about 7170.4422457754. The cubic root of 51415242 is about 371.8467255013.

Adding to 51415242 its reverse (24251415), we get a palindrome (75666657).

The spelling of 51415242 in words is "fifty-one million, four hundred fifteen thousand, two hundred forty-two".