51301242 has 16 divisors (see below), whose sum is σ = 114002880. Its totient is φ = 17100396.

The previous prime is 51301219. The next prime is 51301309. The reversal of 51301242 is 24210315.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474958 + ... + 475065.

It is an arithmetic number, because the mean of its divisors is an integer number (7125180).

Almost surely, 2^51301242 is an apocalyptic number.

51301242 is an abundant number, since it is smaller than the sum of its proper divisors (62701638).

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

51301242 is a wasteful number, since it uses less digits than its factorization.

51301242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950034 (or 950028 counting only the distinct ones).

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

The square root of 51301242 is about 7162.4885340222. The cubic root of 51301242 is about 371.5716974894.

Adding to 51301242 its reverse (24210315), we get a palindrome (75511557).

The spelling of 51301242 in words is "fifty-one million, three hundred one thousand, two hundred forty-two".