215250051 has 8 divisors (see below), whose sum is σ = 287481600. Its totient is φ = 143259272.

The previous prime is 215250017. The next prime is 215250067. The reversal of 215250051 is 150052512.

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 215250051 - 2⁶ = 215249987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215250001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58095 + ... + 61688.

It is an arithmetic number, because the mean of its divisors is an integer number (35935200).

Almost surely, 2^215250051 is an apocalyptic number.

215250051 is a deficient number, since it is larger than the sum of its proper divisors (72231549).

215250051 is a wasteful number, since it uses less digits than its factorization.

215250051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120385.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 215250051 is about 14671.4024891965. The cubic root of 215250051 is about 599.3047975782.

The spelling of 215250051 in words is "two hundred fifteen million, two hundred fifty thousand, fifty-one".