1520053531 has 4 divisors (see below), whose sum is σ = 1572469200. Its totient is φ = 1467637864.

The previous prime is 1520053481. The next prime is 1520053541. The reversal of 1520053531 is 1353500251.

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 1520053531 - 2⁹ = 1520053019 is a prime.

It is a super-2 number, since 2×1520053531² = 4621125474211135922, 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 = 1520053496 and 1520053505.

It is not an unprimeable number, because it can be changed into a prime (1520053541) 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, 26207791 + ... + 26207848.

It is an arithmetic number, because the mean of its divisors is an integer number (393117300).

Almost surely, 2^1520053531 is an apocalyptic number.

1520053531 is a deficient number, since it is larger than the sum of its proper divisors (52415669).

1520053531 is an equidigital number, since it uses as much as digits as its factorization.

1520053531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52415668.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1520053531 is about 38987.8638937811. The cubic root of 1520053531 is about 1149.7929131836.

Adding to 1520053531 its reverse (1353500251), we get a palindrome (2873553782).

The spelling of 1520053531 in words is "one billion, five hundred twenty million, fifty-three thousand, five hundred thirty-one".