42213525 has 24 divisors (see below), whose sum is σ = 70944864. Its totient is φ = 22142400.

The previous prime is 42213517. The next prime is 42213553. The reversal of 42213525 is 52531224.

It is not a de Polignac number, because 42213525 - 2³ = 42213517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42213495 and 42213504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39 + ... + 9188.

It is an arithmetic number, because the mean of its divisors is an integer number (2956036).

Almost surely, 2^42213525 is an apocalyptic number.

It is an amenable number.

42213525 is a deficient number, since it is larger than the sum of its proper divisors (28731339).

42213525 is a wasteful number, since it uses less digits than its factorization.

42213525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301 (or 9296 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 42213525 is about 6497.1936249430. The cubic root of 42213525 is about 348.1907314207.

Adding to 42213525 its reverse (52531224), we get a palindrome (94744749).

The spelling of 42213525 in words is "forty-two million, two hundred thirteen thousand, five hundred twenty-five".