21070522 has 8 divisors (see below), whose sum is σ = 34479072. Its totient is φ = 9577500.

The previous prime is 21070513. The next prime is 21070541. The reversal of 21070522 is 22507012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21070522.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478854 + ... + 478897.

It is an arithmetic number, because the mean of its divisors is an integer number (4309884).

Almost surely, 2^21070522 is an apocalyptic number.

21070522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21070522 is a deficient number, since it is larger than the sum of its proper divisors (13408550).

21070522 is a wasteful number, since it uses less digits than its factorization.

21070522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957764.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 21070522 is about 4590.2638268405. The cubic root of 21070522 is about 276.2009056713.

Adding to 21070522 its reverse (22507012), we get a palindrome (43577534).

The spelling of 21070522 in words is "twenty-one million, seventy thousand, five hundred twenty-two".