215228541 has 16 divisors (see below), whose sum is σ = 314707968. Its totient is φ = 129754800.

The previous prime is 215228537. The next prime is 215228543. The reversal of 215228541 is 145822512.

It is not a de Polignac number, because 215228541 - 2² = 215228537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215228499 and 215228508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215228543) 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 15 ways as a sum of consecutive naturals, for example, 10771 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (19669248).

Almost surely, 2^215228541 is an apocalyptic number.

It is an amenable number.

215228541 is a deficient number, since it is larger than the sum of its proper divisors (99479427).

215228541 is a wasteful number, since it uses less digits than its factorization.

215228541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34352.

The product of its digits is 6400, while the sum is 30.

The square root of 215228541 is about 14670.6694121298. The cubic root of 215228541 is about 599.2848340125.

The spelling of 215228541 in words is "two hundred fifteen million, two hundred twenty-eight thousand, five hundred forty-one".