23551998 has 16 divisors (see below), whose sum is σ = 47258256. Its totient is φ = 7824960.

The previous prime is 23551993. The next prime is 23552051. The reversal of 23551998 is 89915532.

It is a super-3 number, since 3×23551998³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23551991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4393 + ... + 8148.

It is an arithmetic number, because the mean of its divisors is an integer number (2953641).

Almost surely, 2^23551998 is an apocalyptic number.

23551998 is an abundant number, since it is smaller than the sum of its proper divisors (23706258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23551998 is a wasteful number, since it uses less digits than its factorization.

23551998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859.

The product of its digits is 97200, while the sum is 42.

The square root of 23551998 is about 4853.0400781366. The cubic root of 23551998 is about 286.6438215675.

The spelling of 23551998 in words is "twenty-three million, five hundred fifty-one thousand, nine hundred ninety-eight".