215151283 has 4 divisors (see below), whose sum is σ = 215224240. Its totient is φ = 215078328.

The previous prime is 215151257. The next prime is 215151301. The reversal of 215151283 is 382151512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215151283 - 2²¹ = 213054131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215151883) 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, 31860 + ... + 38017.

It is an arithmetic number, because the mean of its divisors is an integer number (53806060).

Almost surely, 2^215151283 is an apocalyptic number.

215151283 is a deficient number, since it is larger than the sum of its proper divisors (72957).

215151283 is an equidigital number, since it uses as much as digits as its factorization.

215151283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72956.

The product of its digits is 2400, while the sum is 28.

The square root of 215151283 is about 14668.0360989466. The cubic root of 215151283 is about 599.2131194086.

The spelling of 215151283 in words is "two hundred fifteen million, one hundred fifty-one thousand, two hundred eighty-three".