1011503540 has 12 divisors (see below), whose sum is σ = 2124157476. Its totient is φ = 404601408.

The previous prime is 1011503527. The next prime is 1011503593. The reversal of 1011503540 is 453051101.

It can be written as a sum of positive squares in 2 ways, for example, as 532594084 + 478909456 = 23078^2 + 21884^2 .

It is a super-2 number, since 2×1011503540² = 2046278822865063200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 50575177 = 1011503540 / (1 + 0 + 1 + 1 + 5 + 0 + 3 + 5 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25287569 + ... + 25287608.

It is an arithmetic number, because the mean of its divisors is an integer number (177013123).

Almost surely, 2^1011503540 is an apocalyptic number.

1011503540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011503540 is an abundant number, since it is smaller than the sum of its proper divisors (1112653936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011503540 is a wasteful number, since it uses less digits than its factorization.

1011503540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50575186 (or 50575184 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1011503540 is about 31804.1434407531. The cubic root of 1011503540 is about 1003.8199030941.

Adding to 1011503540 its reverse (453051101), we get a palindrome (1464554641).

The spelling of 1011503540 in words is "one billion, eleven million, five hundred three thousand, five hundred forty".