23481145 has 4 divisors (see below), whose sum is σ = 28177380. Its totient is φ = 18784912.

The previous prime is 23481127. The next prime is 23481163. The reversal of 23481145 is 54118432.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23481127) and next prime (23481163).

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 16426809 = 2656^2 + 4053^2 .

It is a cyclic number.

It is not a de Polignac number, because 23481145 - 2¹¹ = 23479097 is a prime.

It is a super-2 number, since 2×23481145² = 1102728341022050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348110 + ... + 2348119.

It is an arithmetic number, because the mean of its divisors is an integer number (7044345).

Almost surely, 2^23481145 is an apocalyptic number.

It is an amenable number.

23481145 is a deficient number, since it is larger than the sum of its proper divisors (4696235).

23481145 is an equidigital number, since it uses as much as digits as its factorization.

23481145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696234.

The product of its digits is 3840, while the sum is 28.

The square root of 23481145 is about 4845.7347224131. The cubic root of 23481145 is about 286.3560897864.

Adding to 23481145 its reverse (54118432), we get a palindrome (77599577).

It can be divided in two parts, 23481 and 145, that multiplied together give a triangular number (3404745 = T₂₆₀₉).

The spelling of 23481145 in words is "twenty-three million, four hundred eighty-one thousand, one hundred forty-five".