1540530551 has 6 divisors (see below), whose sum is σ = 1792045800. Its totient is φ = 1320454716.

The previous prime is 1540530517. The next prime is 1540530553. The reversal of 1540530551 is 1550350451.

It is not a de Polignac number, because 1540530551 - 2⁶ = 1540530487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540530553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15719651 + ... + 15719748.

It is an arithmetic number, because the mean of its divisors is an integer number (298674300).

Almost surely, 2^1540530551 is an apocalyptic number.

1540530551 is a deficient number, since it is larger than the sum of its proper divisors (251515249).

1540530551 is an equidigital number, since it uses as much as digits as its factorization.

1540530551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31439413 (or 31439406 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1540530551 is about 39249.5930042593. The cubic root of 1540530551 is about 1154.9329498879.

The spelling of 1540530551 in words is "one billion, five hundred forty million, five hundred thirty thousand, five hundred fifty-one".