511041431 has 4 divisors (see below), whose sum is σ = 511287000. Its totient is φ = 510795864.

The previous prime is 511041413. The next prime is 511041449. The reversal of 511041431 is 134140115.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (511041413) and next prime (511041449).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511041431 is a prime.

It is a super-2 number, since 2×511041431² = 522326688397055522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511041491) 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, 119636 + ... + 123833.

It is an arithmetic number, because the mean of its divisors is an integer number (127821750).

Almost surely, 2^511041431 is an apocalyptic number.

511041431 is a deficient number, since it is larger than the sum of its proper divisors (245569).

511041431 is a wasteful number, since it uses less digits than its factorization.

511041431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245568.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 511041431 is about 22606.2254921073. The cubic root of 511041431 is about 799.5004334190.

Adding to 511041431 its reverse (134140115), we get a palindrome (645181546).

The spelling of 511041431 in words is "five hundred eleven million, forty-one thousand, four hundred thirty-one".