51012418 has 8 divisors (see below), whose sum is σ = 78586812. Its totient is φ = 24816816.

The previous prime is 51012407. The next prime is 51012419. The reversal of 51012418 is 81421015.

It can be written as a sum of positive squares in 2 ways, for example, as 36397089 + 14615329 = 6033^2 + 3823^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51012419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344605 + ... + 344752.

Almost surely, 2^51012418 is an apocalyptic number.

51012418 is a deficient number, since it is larger than the sum of its proper divisors (27574394).

51012418 is a wasteful number, since it uses less digits than its factorization.

51012418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689396.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 51012418 is about 7142.2978095288. The cubic root of 51012418 is about 370.8730733604.

The spelling of 51012418 in words is "fifty-one million, twelve thousand, four hundred eighteen".