23154621 has 16 divisors (see below), whose sum is σ = 35363328. Its totient is φ = 13201200.

The previous prime is 23154617. The next prime is 23154623. The reversal of 23154621 is 12645132.

It is not a de Polignac number, because 23154621 - 2² = 23154617 is a prime.

It is a super-2 number, since 2×23154621² = 1072272947307282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23154591 and 23154600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23154623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11026 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (2210208).

Almost surely, 2^23154621 is an apocalyptic number.

23154621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23154621 is a deficient number, since it is larger than the sum of its proper divisors (12208707).

23154621 is a wasteful number, since it uses less digits than its factorization.

23154621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512.

The product of its digits is 1440, while the sum is 24.

The square root of 23154621 is about 4811.9248747253. The cubic root of 23154621 is about 285.0225528475.

Adding to 23154621 its reverse (12645132), we get a palindrome (35799753).

The spelling of 23154621 in words is "twenty-three million, one hundred fifty-four thousand, six hundred twenty-one".