21961052 has 12 divisors (see below), whose sum is σ = 38918880. Its totient is φ = 10841376.

The previous prime is 21961031. The next prime is 21961057. The reversal of 21961052 is 25016912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21961057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34433 + ... + 35064.

It is an arithmetic number, because the mean of its divisors is an integer number (3243240).

Almost surely, 2^21961052 is an apocalyptic number.

It is an amenable number.

21961052 is a deficient number, since it is larger than the sum of its proper divisors (16957828).

21961052 is a wasteful number, since it uses less digits than its factorization.

21961052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69580 (or 69578 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 21961052 is about 4686.2620498645. The cubic root of 21961052 is about 280.0384811058.

Adding to 21961052 its reverse (25016912), we get a palindrome (46977964).

The spelling of 21961052 in words is "twenty-one million, nine hundred sixty-one thousand, fifty-two".