42772213 has 4 divisors (see below), whose sum is σ = 46660608. Its totient is φ = 38883820.

The previous prime is 42772199. The next prime is 42772217. The reversal of 42772213 is 31227724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42772213 - 2⁵ = 42772181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772217) 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, 1944181 + ... + 1944202.

It is an arithmetic number, because the mean of its divisors is an integer number (11665152).

Almost surely, 2^42772213 is an apocalyptic number.

It is an amenable number.

42772213 is a deficient number, since it is larger than the sum of its proper divisors (3888395).

42772213 is a wasteful number, since it uses less digits than its factorization.

42772213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888394.

The product of its digits is 4704, while the sum is 28.

The square root of 42772213 is about 6540.0468652755. The cubic root of 42772213 is about 349.7200836765.

Adding to 42772213 its reverse (31227724), we get a palindrome (73999937).

The spelling of 42772213 in words is "forty-two million, seven hundred seventy-two thousand, two hundred thirteen".