21310149 has 12 divisors (see below), whose sum is σ = 33052704. Its totient is φ = 12177144.

The previous prime is 21310147. The next prime is 21310181. The reversal of 21310149 is 94101312.

It is not a de Polignac number, because 21310149 - 2¹ = 21310147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72337 + ... + 72630.

It is an arithmetic number, because the mean of its divisors is an integer number (2754392).

Almost surely, 2^21310149 is an apocalyptic number.

It is an amenable number.

21310149 is a deficient number, since it is larger than the sum of its proper divisors (11742555).

21310149 is a wasteful number, since it uses less digits than its factorization.

21310149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144984 (or 144977 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 21310149 is about 4616.2916935566. The cubic root of 21310149 is about 277.2440038295.

The spelling of 21310149 in words is "twenty-one million, three hundred ten thousand, one hundred forty-nine".