1612431543 has 4 divisors (see below), whose sum is σ = 2149908728. Its totient is φ = 1074954360.

The previous prime is 1612431539. The next prime is 1612431563. The reversal of 1612431543 is 3451342161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3451342161 = 3 ⋅1150447387.

It is not a de Polignac number, because 1612431543 - 2² = 1612431539 is a prime.

It is a super-2 number, since 2×1612431543² = 5199870961722721698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1612431543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612431533) 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, 268738588 + ... + 268738593.

It is an arithmetic number, because the mean of its divisors is an integer number (537477182).

Almost surely, 2^1612431543 is an apocalyptic number.

1612431543 is a deficient number, since it is larger than the sum of its proper divisors (537477185).

1612431543 is an equidigital number, since it uses as much as digits as its factorization.

1612431543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537477184.

The product of its digits is 8640, while the sum is 30.

The square root of 1612431543 is about 40155.0936121434. The cubic root of 1612431543 is about 1172.6284547308.

The spelling of 1612431543 in words is "one billion, six hundred twelve million, four hundred thirty-one thousand, five hundred forty-three".