1520534343 has 4 divisors (see below), whose sum is σ = 2027379128. Its totient is φ = 1013689560.

The previous prime is 1520534339. The next prime is 1520534359. The reversal of 1520534343 is 3434350251.

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

It is not a de Polignac number, because 1520534343 - 2² = 1520534339 is a prime.

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 1520534343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520534363) 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, 253422388 + ... + 253422393.

It is an arithmetic number, because the mean of its divisors is an integer number (506844782).

Almost surely, 2^1520534343 is an apocalyptic number.

1520534343 is a deficient number, since it is larger than the sum of its proper divisors (506844785).

1520534343 is an equidigital number, since it uses as much as digits as its factorization.

1520534343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506844784.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 1520534343 is about 38994.0295814629. The cubic root of 1520534343 is about 1149.9141317108.

Adding to 1520534343 its reverse (3434350251), we get a palindrome (4954884594).

The spelling of 1520534343 in words is "one billion, five hundred twenty million, five hundred thirty-four thousand, three hundred forty-three".