20121522 has 8 divisors (see below), whose sum is σ = 40243056. Its totient is φ = 6707172.

The previous prime is 20121467. The next prime is 20121533. The reversal of 20121522 is 22512102.

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

20121522 is an admirable number.

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, 1676788 + ... + 1676799.

It is an arithmetic number, because the mean of its divisors is an integer number (5030382).

Almost surely, 2^20121522 is an apocalyptic number.

20121522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121522 is a wasteful number, since it uses less digits than its factorization.

20121522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353592.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20121522 is about 4485.7019517574. The cubic root of 20121522 is about 271.9904210150.

Adding to 20121522 its reverse (22512102), we get a palindrome (42633624).

The spelling of 20121522 in words is "twenty million, one hundred twenty-one thousand, five hundred twenty-two".