21610152 has 40 divisors (see below), whose sum is σ = 60530250. Its totient is φ = 7203168.

The previous prime is 21610151. The next prime is 21610187. The reversal of 21610152 is 25101612.

21610152 is a `hidden beast` number, since 2 + 1 + 610 + 1 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12574116 + 9036036 = 3546^2 + 3006^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (21610151) 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 9 ways as a sum of consecutive naturals, for example, 16027 + ... + 17322.

Almost surely, 2^21610152 is an apocalyptic number.

It is an amenable number.

21610152 is an abundant number, since it is smaller than the sum of its proper divisors (38920098).

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

21610152 is a wasteful number, since it uses less digits than its factorization.

21610152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33367 (or 33354 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 21610152 is about 4648.6720684514. The cubic root of 21610152 is about 278.5389541181.

Adding to 21610152 its reverse (25101612), we get a palindrome (46711764).

It can be divided in two parts, 216101 and 52, that added together give a triangular number (216153 = T₆₅₇).

The spelling of 21610152 in words is "twenty-one million, six hundred ten thousand, one hundred fifty-two".