51217426 has 32 divisors (see below), whose sum is σ = 87696000. Its totient is φ = 22239360.

The previous prime is 51217417. The next prime is 51217427. The reversal of 51217426 is 62471215.

It is a junction number, because it is equal to n+sod(n) for n = 51217394 and 51217403.

It is not an unprimeable number, because it can be changed into a prime (51217427) 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, 98046 + ... + 98566.

It is an arithmetic number, because the mean of its divisors is an integer number (2740500).

Almost surely, 2^51217426 is an apocalyptic number.

51217426 is a deficient number, since it is larger than the sum of its proper divisors (36478574).

51217426 is a wasteful number, since it uses less digits than its factorization.

51217426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754.

The product of its digits is 3360, while the sum is 28.

The square root of 51217426 is about 7156.6351031752. The cubic root of 51217426 is about 371.3692291642.

The spelling of 51217426 in words is "fifty-one million, two hundred seventeen thousand, four hundred twenty-six".