395140531 has 4 divisors (see below), whose sum is σ = 397348200. Its totient is φ = 392932864.

The previous prime is 395140519. The next prime is 395140553. The reversal of 395140531 is 135041593.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 395140531 - 2⁹ = 395140019 is a prime.

It is a super-2 number, since 2×395140531² = 312272078477923922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 395140493 and 395140502.

It is not an unprimeable number, because it can be changed into a prime (395140591) 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, 1103566 + ... + 1103923.

It is an arithmetic number, because the mean of its divisors is an integer number (99337050).

Almost surely, 2^395140531 is an apocalyptic number.

395140531 is a deficient number, since it is larger than the sum of its proper divisors (2207669).

395140531 is a wasteful number, since it uses less digits than its factorization.

395140531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207668.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 395140531 is about 19878.1420409454. The cubic root of 395140531 is about 733.8103952098.

The spelling of 395140531 in words is "three hundred ninety-five million, one hundred forty thousand, five hundred thirty-one".