23251221403 has 2 divisors, whose sum is σ = 23251221404. Its totient is φ = 23251221402.

The previous prime is 23251221359. The next prime is 23251221437. The reversal of 23251221403 is 30412215232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23251221403 is a prime.

It is not a weakly prime, because it can be changed into another prime (23251221473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11625610701 + 11625610702.

It is an arithmetic number, because the mean of its divisors is an integer number (11625610702).

Almost surely, 2^23251221403 is an apocalyptic number.

23251221403 is a deficient number, since it is larger than the sum of its proper divisors (1).

23251221403 is an equidigital number, since it uses as much as digits as its factorization.

23251221403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 23251221403 its reverse (30412215232), we get a palindrome (53663436635).

The spelling of 23251221403 in words is "twenty-three billion, two hundred fifty-one million, two hundred twenty-one thousand, four hundred three".