42213861 has 12 divisors (see below), whose sum is σ = 61034688. Its totient is φ = 28115304.

The previous prime is 42213841. The next prime is 42213863. The reversal of 42213861 is 16831224.

It is not a de Polignac number, because 42213861 - 2⁶ = 42213797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42213863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12766 + ... + 15728.

It is an arithmetic number, because the mean of its divisors is an integer number (5086224).

Almost surely, 2^42213861 is an apocalyptic number.

It is an amenable number.

42213861 is a deficient number, since it is larger than the sum of its proper divisors (18820827).

42213861 is a wasteful number, since it uses less digits than its factorization.

42213861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552 (or 4549 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 42213861 is about 6497.2194822093. The cubic root of 42213861 is about 348.1916552303.

The spelling of 42213861 in words is "forty-two million, two hundred thirteen thousand, eight hundred sixty-one".