51404215 has 8 divisors (see below), whose sum is σ = 64931760. Its totient is φ = 38958912.

The previous prime is 51404189. The next prime is 51404219. The reversal of 51404215 is 51240415.

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

It is a cyclic number.

It is not a de Polignac number, because 51404215 - 2⁵ = 51404183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51404219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270454 + ... + 270643.

It is an arithmetic number, because the mean of its divisors is an integer number (8116470).

Almost surely, 2^51404215 is an apocalyptic number.

51404215 is a deficient number, since it is larger than the sum of its proper divisors (13527545).

51404215 is a wasteful number, since it uses less digits than its factorization.

51404215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541121.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51404215 is about 7169.6732840486. The cubic root of 51404215 is about 371.8201403432.

The spelling of 51404215 in words is "fifty-one million, four hundred four thousand, two hundred fifteen".