51201215 has 8 divisors (see below), whose sum is σ = 66167808. Its totient is φ = 37810080.

The previous prime is 51201187. The next prime is 51201217. The reversal of 51201215 is 51210215.

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

It is not a de Polignac number, because 51201215 - 2¹² = 51197119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51201193 and 51201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201217) 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, 393791 + ... + 393920.

It is an arithmetic number, because the mean of its divisors is an integer number (8270976).

Almost surely, 2^51201215 is an apocalyptic number.

51201215 is a deficient number, since it is larger than the sum of its proper divisors (14966593).

51201215 is a wasteful number, since it uses less digits than its factorization.

51201215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787729.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51201215 is about 7155.5024282017. The cubic root of 51201215 is about 371.3300439212.

The spelling of 51201215 in words is "fifty-one million, two hundred one thousand, two hundred fifteen".