21625150 has 12 divisors (see below), whose sum is σ = 40222872. Its totient is φ = 8650040.

The previous prime is 21625117. The next prime is 21625181. The reversal of 21625150 is 5152612.

It is a super-2 number, since 2×21625150² = 935294225045000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216202 + ... + 216301.

It is an arithmetic number, because the mean of its divisors is an integer number (3351906).

Almost surely, 2^21625150 is an apocalyptic number.

21625150 is a deficient number, since it is larger than the sum of its proper divisors (18597722).

21625150 is a wasteful number, since it uses less digits than its factorization.

21625150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432515 (or 432510 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 21625150 is about 4650.2849375065. The cubic root of 21625150 is about 278.6033769438.

Adding to 21625150 its reverse (5152612), we get a palindrome (26777762).

The spelling of 21625150 in words is "twenty-one million, six hundred twenty-five thousand, one hundred fifty".