22641621 has 8 divisors (see below), whose sum is σ = 30216384. Its totient is φ = 15080640.

The previous prime is 22641617. The next prime is 22641629. The reversal of 22641621 is 12614622.

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

It is not a de Polignac number, because 22641621 - 2² = 22641617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22641591 and 22641600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22641629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (3777048).

Almost surely, 2^22641621 is an apocalyptic number.

It is an amenable number.

22641621 is a deficient number, since it is larger than the sum of its proper divisors (7574763).

22641621 is a wasteful number, since it uses less digits than its factorization.

22641621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891.

The product of its digits is 1152, while the sum is 24.

The square root of 22641621 is about 4758.3212375795. The cubic root of 22641621 is about 282.9018834369.

The spelling of 22641621 in words is "twenty-two million, six hundred forty-one thousand, six hundred twenty-one".