23531155251 has 8 divisors (see below), whose sum is σ = 33220454544. Its totient is φ = 14764646400.

The previous prime is 23531155243. The next prime is 23531155259. The reversal of 23531155251 is 15255113532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23531155243) and next prime (23531155259).

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

It is not a de Polignac number, because 23531155251 - 2³ = 23531155243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23531155259) 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, 230697550 + ... + 230697651.

It is an arithmetic number, because the mean of its divisors is an integer number (4152556818).

Almost surely, 2^23531155251 is an apocalyptic number.

23531155251 is a deficient number, since it is larger than the sum of its proper divisors (9689299293).

23531155251 is a wasteful number, since it uses less digits than its factorization.

23531155251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461395221.

The product of its digits is 22500, while the sum is 33.

Adding to 23531155251 its reverse (15255113532), we get a palindrome (38786268783).

The spelling of 23531155251 in words is "twenty-three billion, five hundred thirty-one million, one hundred fifty-five thousand, two hundred fifty-one".