1520545531 has 8 divisors (see below), whose sum is σ = 1536019760. Its totient is φ = 1505099232.

The previous prime is 1520545517. The next prime is 1520545561. The reversal of 1520545531 is 1355450251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1520545531 - 2¹⁷ = 1520414459 is a prime.

It is a super-2 number, since 2×1520545531² = 4624117423688143922, 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 = 1520545493 and 1520545502.

It is not an unprimeable number, because it can be changed into a prime (1520545561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112756 + ... + 125518.

It is an arithmetic number, because the mean of its divisors is an integer number (192002470).

Almost surely, 2^1520545531 is an apocalyptic number.

1520545531 is a deficient number, since it is larger than the sum of its proper divisors (15474229).

1520545531 is a wasteful number, since it uses less digits than its factorization.

1520545531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13965.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1520545531 is about 38994.1730390580. The cubic root of 1520545531 is about 1149.9169520368.

Adding to 1520545531 its reverse (1355450251), we get a palindrome (2875995782).

The spelling of 1520545531 in words is "one billion, five hundred twenty million, five hundred forty-five thousand, five hundred thirty-one".