1505440013 has 12 divisors (see below), whose sum is σ = 1891132320. Its totient is φ = 1173069480.

The previous prime is 1505439983. The next prime is 1505440021. The reversal of 1505440013 is 3100445051.

It is not a de Polignac number, because 1505440013 - 2²⁰ = 1504391437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1505440213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 887843 + ... + 889536.

It is an arithmetic number, because the mean of its divisors is an integer number (157594360).

Almost surely, 2^1505440013 is an apocalyptic number.

It is an amenable number.

1505440013 is a deficient number, since it is larger than the sum of its proper divisors (385692307).

1505440013 is a wasteful number, since it uses less digits than its factorization.

1505440013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777408 (or 1777397 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1505440013 is about 38800.0001675258. Note that the first 3 decimals coincide. The cubic root of 1505440013 is about 1146.0964086440.

Adding to 1505440013 its reverse (3100445051), we get a palindrome (4605885064).

The spelling of 1505440013 in words is "one billion, five hundred five million, four hundred forty thousand, thirteen".