23151433 has 4 divisors (see below), whose sum is σ = 24513300. Its totient is φ = 21789568.

The previous prime is 23151431. The next prime is 23151437. The reversal of 23151433 is 33415132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21086464 + 2064969 = 4592^2 + 1437^2 .

It is a cyclic number.

It is not a de Polignac number, because 23151433 - 2¹ = 23151431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23151431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680908 + ... + 680941.

It is an arithmetic number, because the mean of its divisors is an integer number (6128325).

Almost surely, 2^23151433 is an apocalyptic number.

It is an amenable number.

23151433 is a deficient number, since it is larger than the sum of its proper divisors (1361867).

23151433 is a wasteful number, since it uses less digits than its factorization.

23151433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361866.

The product of its digits is 1080, while the sum is 22.

The square root of 23151433 is about 4811.5936029553. The cubic root of 23151433 is about 285.0094713175.

Adding to 23151433 its reverse (33415132), we get a palindrome (56566565).

The spelling of 23151433 in words is "twenty-three million, one hundred fifty-one thousand, four hundred thirty-three".