21522523502 has 4 divisors (see below), whose sum is σ = 32283785256. Its totient is φ = 10761261750.

The previous prime is 21522523459. The next prime is 21522523511. The reversal of 21522523502 is 20532522512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5380630874 + ... + 5380630877.

It is an arithmetic number, because the mean of its divisors is an integer number (8070946314).

Almost surely, 2^21522523502 is an apocalyptic number.

21522523502 is a deficient number, since it is larger than the sum of its proper divisors (10761261754).

21522523502 is a wasteful number, since it uses less digits than its factorization.

21522523502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10761261753.

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 21522523502 in words is "twenty-one billion, five hundred twenty-two million, five hundred twenty-three thousand, five hundred two".