23571442 has 12 divisors (see below), whose sum is σ = 36342810. Its totient is φ = 11465856.

The previous prime is 23571421. The next prime is 23571463. The reversal of 23571442 is 24417532.

It is an interprime number because it is at equal distance from previous prime (23571421) and next prime (23571463).

It can be written as a sum of positive squares in 3 ways, for example, as 23435281 + 136161 = 4841^2 + 369^2 .

It is a super-2 number, since 2×23571442² = 1111225755918728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23571442.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1567 + ... + 7042.

Almost surely, 2^23571442 is an apocalyptic number.

23571442 is a deficient number, since it is larger than the sum of its proper divisors (12771368).

23571442 is an equidigital number, since it uses as much as digits as its factorization.

23571442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8685 (or 8648 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 23571442 is about 4855.0429452272. The cubic root of 23571442 is about 286.7226821010.

Adding to 23571442 its reverse (24417532), we get a palindrome (47988974).

The spelling of 23571442 in words is "twenty-three million, five hundred seventy-one thousand, four hundred forty-two".