38143261 has 4 divisors (see below), whose sum is σ = 41077372. Its totient is φ = 35209152.

The previous prime is 38143219. The next prime is 38143267. The reversal of 38143261 is 16234183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16234183 = 7 ⋅2319169.

It can be written as a sum of positive squares in 2 ways, for example, as 15760900 + 22382361 = 3970^2 + 4731^2 .

It is a cyclic number.

It is not a de Polignac number, because 38143261 - 2⁹ = 38142749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38143267) 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, 1467036 + ... + 1467061.

It is an arithmetic number, because the mean of its divisors is an integer number (10269343).

Almost surely, 2^38143261 is an apocalyptic number.

It is an amenable number.

38143261 is a deficient number, since it is larger than the sum of its proper divisors (2934111).

38143261 is a wasteful number, since it uses less digits than its factorization.

38143261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934110.

The product of its digits is 3456, while the sum is 28.

The square root of 38143261 is about 6176.0230731434. The cubic root of 38143261 is about 336.6195020467.

The spelling of 38143261 in words is "thirty-eight million, one hundred forty-three thousand, two hundred sixty-one".