23090145 has 16 divisors (see below), whose sum is σ = 39786432. Its totient is φ = 11367360.

The previous prime is 23090087. The next prime is 23090159. The reversal of 23090145 is 54109032.

It is not a de Polignac number, because 23090145 - 2⁷ = 23090017 is a prime.

It is a super-2 number, since 2×23090145² = 1066309592242050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59011 + ... + 59400.

It is an arithmetic number, because the mean of its divisors is an integer number (2486652).

Almost surely, 2^23090145 is an apocalyptic number.

It is an amenable number.

23090145 is a deficient number, since it is larger than the sum of its proper divisors (16696287).

23090145 is a wasteful number, since it uses less digits than its factorization.

23090145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118432.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 23090145 is about 4805.2205984741. The cubic root of 23090145 is about 284.7577504408.

Adding to 23090145 its reverse (54109032), we get a palindrome (77199177).

The spelling of 23090145 in words is "twenty-three million, ninety thousand, one hundred forty-five".