221150439 has 16 divisors (see below), whose sum is σ = 327862240. Its totient is φ = 147329280.

The previous prime is 221150431. The next prime is 221150441. The reversal of 221150439 is 934051122.

221150439 is a `hidden beast` number, since 221 + 1 + 5 + 0 + 439 = 666.

It is not a de Polignac number, because 221150439 - 2³ = 221150431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221150431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64119 + ... + 67479.

It is an arithmetic number, because the mean of its divisors is an integer number (20491390).

Almost surely, 2^221150439 is an apocalyptic number.

221150439 is a deficient number, since it is larger than the sum of its proper divisors (106711801).

221150439 is a wasteful number, since it uses less digits than its factorization.

221150439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807 (or 5801 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 221150439 is about 14871.1276976563. The cubic root of 221150439 is about 604.7315148659.

It can be divided in two parts, 2211 and 50439, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 221150439 in words is "two hundred twenty-one million, one hundred fifty thousand, four hundred thirty-nine".