23211351354431 has 4 divisors (see below), whose sum is σ = 23224547121600. Its totient is φ = 23198155587264.

The previous prime is 23211351354427. The next prime is 23211351354437. The reversal of 23211351354431 is 13445315311232.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23211351354431 - 2² = 23211351354427 is a prime.

It is a super-2 number, since 2×23211351354431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211351354437) 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, 6597880946 + ... + 6597884463.

It is an arithmetic number, because the mean of its divisors is an integer number (5806136780400).

Almost surely, 2^{23211351354431} is an apocalyptic number.

23211351354431 is a deficient number, since it is larger than the sum of its proper divisors (13195767169).

23211351354431 is a wasteful number, since it uses less digits than its factorization.

23211351354431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13195767168.

The product of its digits is 129600, while the sum is 38.

Adding to 23211351354431 its reverse (13445315311232), we get a palindrome (36656666665663).

The spelling of 23211351354431 in words is "twenty-three trillion, two hundred eleven billion, three hundred fifty-one million, three hundred fifty-four thousand, four hundred thirty-one".