51240862 has 4 divisors (see below), whose sum is σ = 76861296. Its totient is φ = 25620430.

The previous prime is 51240859. The next prime is 51240869. The reversal of 51240862 is 26804215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26804215 = 5 ⋅5360843.

It is a self number, because there is not a number n which added to its sum of digits gives 51240862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51240869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810214 + ... + 12810217.

It is an arithmetic number, because the mean of its divisors is an integer number (19215324).

Almost surely, 2^51240862 is an apocalyptic number.

51240862 is a deficient number, since it is larger than the sum of its proper divisors (25620434).

51240862 is a wasteful number, since it uses less digits than its factorization.

51240862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25620433.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 51240862 is about 7158.2722775821. The cubic root of 51240862 is about 371.4258640687.

The spelling of 51240862 in words is "fifty-one million, two hundred forty thousand, eight hundred sixty-two".