23351421 has 8 divisors (see below), whose sum is σ = 32966784. Its totient is φ = 14651840.

The previous prime is 23351413. The next prime is 23351423. The reversal of 23351421 is 12415332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23351421 - 2³ = 23351413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23351423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228885 + ... + 228986.

It is an arithmetic number, because the mean of its divisors is an integer number (4120848).

Almost surely, 2^23351421 is an apocalyptic number.

It is an amenable number.

23351421 is a deficient number, since it is larger than the sum of its proper divisors (9615363).

23351421 is a wasteful number, since it uses less digits than its factorization.

23351421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457891.

The product of its digits is 720, while the sum is 21.

The square root of 23351421 is about 4832.3308040737. The cubic root of 23351421 is about 285.8277811360.

Adding to 23351421 its reverse (12415332), we get a palindrome (35766753).

The spelling of 23351421 in words is "twenty-three million, three hundred fifty-one thousand, four hundred twenty-one".