531401311 has 4 divisors (see below), whose sum is σ = 607315792. Its totient is φ = 455486832.

The previous prime is 531401263. The next prime is 531401333. The reversal of 531401311 is 113104135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113104135 = 5 ⋅22620827.

It is a cyclic number.

It is not a de Polignac number, because 531401311 - 2⁷ = 531401183 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 (531401341) 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, 37957230 + ... + 37957243.

It is an arithmetic number, because the mean of its divisors is an integer number (151828948).

Almost surely, 2^531401311 is an apocalyptic number.

531401311 is a deficient number, since it is larger than the sum of its proper divisors (75914481).

531401311 is an equidigital number, since it uses as much as digits as its factorization.

531401311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75914480.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 531401311 is about 23052.1433059922. The cubic root of 531401311 is about 809.9798353970.

Adding to 531401311 its reverse (113104135), we get a palindrome (644505446).

The spelling of 531401311 in words is "five hundred thirty-one million, four hundred one thousand, three hundred eleven".