23151530 has 16 divisors (see below), whose sum is σ = 41831424. Its totient is φ = 9225360.

The previous prime is 23151521. The next prime is 23151533. The reversal of 23151530 is 3515132.

It is not an unprimeable number, because it can be changed into a prime (23151533) 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 7 ways as a sum of consecutive naturals, for example, 1562 + ... + 6981.

It is an arithmetic number, because the mean of its divisors is an integer number (2614464).

Almost surely, 2^23151530 is an apocalyptic number.

23151530 is a deficient number, since it is larger than the sum of its proper divisors (18679894).

23151530 is a wasteful number, since it uses less digits than its factorization.

23151530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8821.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23151530 is about 4811.6036827652. The cubic root of 23151530 is about 285.0098693617.

Adding to 23151530 its reverse (3515132), we get a palindrome (26666662).

The spelling of 23151530 in words is "twenty-three million, one hundred fifty-one thousand, five hundred thirty".