611431 has 4 divisors (see below), whose sum is σ = 616032. Its totient is φ = 606832.

The previous prime is 611419. The next prime is 611441. The reversal of 611431 is 134116.

611431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 611431 - 2⁹ = 610919 is a prime.

It is a super-2 number, since 2×611431² = 747695735522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

611431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611411) 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, 2095 + ... + 2368.

It is an arithmetic number, because the mean of its divisors is an integer number (154008).

2⁶¹¹⁴³¹ is an apocalyptic number.

611431 is a deficient number, since it is larger than the sum of its proper divisors (4601).

611431 is a wasteful number, since it uses less digits than its factorization.

611431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600.

The product of its digits is 72, while the sum is 16.

The square root of 611431 is about 781.9405348235. The cubic root of 611431 is about 84.8755271552.

Adding to 611431 its reverse (134116), we get a palindrome (745547).

It can be divided in two parts, 6 and 11431, that multiplied together give a palindrome (68586).

The spelling of 611431 in words is "six hundred eleven thousand, four hundred thirty-one".