1340515531 has 16 divisors (see below), whose sum is σ = 1428481440. Its totient is φ = 1254355200.

The previous prime is 1340515523. The next prime is 1340515543. The reversal of 1340515531 is 1355150431.

It is a cyclic number.

It is not a de Polignac number, because 1340515531 - 2³ = 1340515523 is a prime.

It is a super-2 number, since 2×1340515531² = 3593963777704423922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340515531.

It is not an unprimeable number, because it can be changed into a prime (1340515511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406151 + ... + 1407103.

It is an arithmetic number, because the mean of its divisors is an integer number (89280090).

Almost surely, 2^1340515531 is an apocalyptic number.

1340515531 is a deficient number, since it is larger than the sum of its proper divisors (87965909).

1340515531 is a wasteful number, since it uses less digits than its factorization.

1340515531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 1340515531 is about 36613.0513751586. The cubic root of 1340515531 is about 1102.6151362592.

Adding to 1340515531 its reverse (1355150431), we get a palindrome (2695665962).

The spelling of 1340515531 in words is "one billion, three hundred forty million, five hundred fifteen thousand, five hundred thirty-one".