21034522 has 4 divisors (see below), whose sum is σ = 31551786. Its totient is φ = 10517260.

The previous prime is 21034513. The next prime is 21034543. The reversal of 21034522 is 22543012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 1418481 = 4429^2 + 1191^2 .

It is a super-2 number, since 2×21034522² = 884902231536968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21034522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258629 + ... + 5258632.

Almost surely, 2^21034522 is an apocalyptic number.

21034522 is a deficient number, since it is larger than the sum of its proper divisors (10517264).

21034522 is a wasteful number, since it uses less digits than its factorization.

21034522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517263.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21034522 is about 4586.3408072231. The cubic root of 21034522 is about 276.0435151581.

Adding to 21034522 its reverse (22543012), we get a palindrome (43577534).

The spelling of 21034522 in words is "twenty-one million, thirty-four thousand, five hundred twenty-two".