51505126 has 4 divisors (see below), whose sum is σ = 77257692. Its totient is φ = 25752562.

The previous prime is 51505123. The next prime is 51505127. The reversal of 51505126 is 62150515.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51505126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12876280 + ... + 12876283.

It is an arithmetic number, because the mean of its divisors is an integer number (19314423).

Almost surely, 2^51505126 is an apocalyptic number.

51505126 is a deficient number, since it is larger than the sum of its proper divisors (25752566).

51505126 is a wasteful number, since it uses less digits than its factorization.

51505126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25752565.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51505126 is about 7176.7071836602. The cubic root of 51505126 is about 372.0632865311.

The spelling of 51505126 in words is "fifty-one million, five hundred five thousand, one hundred twenty-six".