215223141 has 12 divisors (see below), whose sum is σ = 333815712. Its totient is φ = 122984568.

The previous prime is 215223139. The next prime is 215223143. The reversal of 215223141 is 141322512.

It is an interprime number because it is at equal distance from previous prime (215223139) and next prime (215223143).

It is not a de Polignac number, because 215223141 - 2¹ = 215223139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215223143) 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 11 ways as a sum of consecutive naturals, for example, 731905 + ... + 732198.

It is an arithmetic number, because the mean of its divisors is an integer number (27817976).

Almost surely, 2^215223141 is an apocalyptic number.

215223141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

215223141 is a deficient number, since it is larger than the sum of its proper divisors (118592571).

215223141 is a wasteful number, since it uses less digits than its factorization.

215223141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464120 (or 1464113 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 215223141 is about 14670.4853702936. The cubic root of 215223141 is about 599.2798220298.

Adding to 215223141 its reverse (141322512), we get a palindrome (356545653).

The spelling of 215223141 in words is "two hundred fifteen million, two hundred twenty-three thousand, one hundred forty-one".