23151121245 has 32 divisors (see below), whose sum is σ = 47037200640. Its totient is φ = 10583369280.

The previous prime is 23151121243. The next prime is 23151121313. The reversal of 23151121245 is 54212115132.

It is a happy number.

23151121245 is a `hidden beast` number, since 23 + 1 + 511 + 2 + 124 + 5 = 666.

It is not a de Polignac number, because 23151121245 - 2¹ = 23151121243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23151121243) 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 31 ways as a sum of consecutive naturals, for example, 12248326 + ... + 12250215.

It is an arithmetic number, because the mean of its divisors is an integer number (1469912520).

Almost surely, 2^23151121245 is an apocalyptic number.

It is an amenable number.

23151121245 is an abundant number, since it is smaller than the sum of its proper divisors (23886079395).

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

23151121245 is a wasteful number, since it uses less digits than its factorization.

23151121245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24498562 (or 24498556 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 23151121245 its reverse (54212115132), we get a palindrome (77363236377).

The spelling of 23151121245 in words is "twenty-three billion, one hundred fifty-one million, one hundred twenty-one thousand, two hundred forty-five".