1503135681 has 4 divisors (see below), whose sum is σ = 2004180912. Its totient is φ = 1002090452.

The previous prime is 1503135643. The next prime is 1503135707. The reversal of 1503135681 is 1865313051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1503135681 - 2¹⁴ = 1503119297 is a prime.

It is a super-2 number, since 2×1503135681² = 4518833750990667522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1503135181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250522611 + ... + 250522616.

It is an arithmetic number, because the mean of its divisors is an integer number (501045228).

Almost surely, 2^1503135681 is an apocalyptic number.

It is an amenable number.

1503135681 is a deficient number, since it is larger than the sum of its proper divisors (501045231).

1503135681 is an equidigital number, since it uses as much as digits as its factorization.

1503135681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501045230.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1503135681 is about 38770.2937956369. The cubic root of 1503135681 is about 1145.5113448649.

The spelling of 1503135681 in words is "one billion, five hundred three million, one hundred thirty-five thousand, six hundred eighty-one".