51002215 has 8 divisors (see below), whose sum is σ = 66766608. Its totient is φ = 37092480.

The previous prime is 51002207. The next prime is 51002219. The reversal of 51002215 is 51220015.

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

It is not a de Polignac number, because 51002215 - 2³ = 51002207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002219) 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, 463602 + ... + 463711.

It is an arithmetic number, because the mean of its divisors is an integer number (8345826).

Almost surely, 2^51002215 is an apocalyptic number.

51002215 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51002215 is a deficient number, since it is larger than the sum of its proper divisors (15764393).

51002215 is a wasteful number, since it uses less digits than its factorization.

51002215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927329.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 51002215 is about 7141.5835078783. The cubic root of 51002215 is about 370.8483455887.

The spelling of 51002215 in words is "fifty-one million, two thousand, two hundred fifteen".