42447213 has 32 divisors (see below), whose sum is σ = 67910400. Its totient is φ = 26123328.

The previous prime is 42447193. The next prime is 42447217. The reversal of 42447213 is 31274424.

42447213 is a `hidden beast` number, since 4 + 2 + 447 + 213 = 666.

It is not a de Polignac number, because 42447213 - 2¹⁰ = 42446189 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42447217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16831 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (2122200).

Almost surely, 2^42447213 is an apocalyptic number.

It is an amenable number.

42447213 is a deficient number, since it is larger than the sum of its proper divisors (25463187).

42447213 is a wasteful number, since it uses less digits than its factorization.

42447213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2412 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 42447213 is about 6515.1525692036. The cubic root of 42447213 is about 348.8320606989.

The spelling of 42447213 in words is "forty-two million, four hundred forty-seven thousand, two hundred thirteen".