571942138 has 4 divisors (see below), whose sum is σ = 857913210. Its totient is φ = 285971068.

The previous prime is 571942117. The next prime is 571942139. The reversal of 571942138 is 831249175.

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

It can be written as a sum of positive squares in only one way, i.e., 360734049 + 211208089 = 18993^2 + 14533^2 .

It is a super-2 number, since 2×571942138² = 654235618440022088, 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 571942138.

It is not an unprimeable number, because it can be changed into a prime (571942139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142985533 + ... + 142985536.

Almost surely, 2^571942138 is an apocalyptic number.

571942138 is a deficient number, since it is larger than the sum of its proper divisors (285971072).

571942138 is a wasteful number, since it uses less digits than its factorization.

571942138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285971071.

The product of its digits is 60480, while the sum is 40.

The square root of 571942138 is about 23915.3117897300. The cubic root of 571942138 is about 830.0750587755.

The spelling of 571942138 in words is "five hundred seventy-one million, nine hundred forty-two thousand, one hundred thirty-eight".