612543431 has 4 divisors (see below), whose sum is σ = 612708552. Its totient is φ = 612378312.

The previous prime is 612543427. The next prime is 612543443. The reversal of 612543431 is 134345216.

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 612543431 - 2² = 612543427 is a prime.

It is a super-2 number, since 2×612543431² = 750418909722503522, 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 = 612543394 and 612543403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612543401) 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, 76865 + ... + 84458.

It is an arithmetic number, because the mean of its divisors is an integer number (153177138).

Almost surely, 2^612543431 is an apocalyptic number.

612543431 is a deficient number, since it is larger than the sum of its proper divisors (165121).

612543431 is a wasteful number, since it uses less digits than its factorization.

612543431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165120.

The product of its digits is 8640, while the sum is 29.

The square root of 612543431 is about 24749.6147646787. The cubic root of 612543431 is about 849.2696984413.

Adding to 612543431 its reverse (134345216), we get a palindrome (746888647).

The spelling of 612543431 in words is "six hundred twelve million, five hundred forty-three thousand, four hundred thirty-one".