23154001547 has 4 divisors (see below), whose sum is σ = 24516001656. Its totient is φ = 21792001440.

The previous prime is 23154001543. The next prime is 23154001561. The reversal of 23154001547 is 74510045132.

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 23154001547 - 2² = 23154001543 is a prime.

It is a super-2 number, since 2×23154001547² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23154001543) 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, 681000029 + ... + 681000062.

It is an arithmetic number, because the mean of its divisors is an integer number (6129000414).

Almost surely, 2^23154001547 is an apocalyptic number.

23154001547 is a deficient number, since it is larger than the sum of its proper divisors (1362000109).

23154001547 is a wasteful number, since it uses less digits than its factorization.

23154001547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362000108.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 23154001547 its reverse (74510045132), we get a palindrome (97664046679).

The spelling of 23154001547 in words is "twenty-three billion, one hundred fifty-four million, one thousand, five hundred forty-seven".