1531140761 has 8 divisors (see below), whose sum is σ = 1572462720. Its totient is φ = 1490183248.

The previous prime is 1531140733. The next prime is 1531140799. The reversal of 1531140761 is 1670411351.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1531140761 - 2¹⁸ = 1530878617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1531148761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82586 + ... + 99411.

It is an arithmetic number, because the mean of its divisors is an integer number (196557840).

Almost surely, 2^1531140761 is an apocalyptic number.

It is an amenable number.

1531140761 is a deficient number, since it is larger than the sum of its proper divisors (41321959).

1531140761 is a wasteful number, since it uses less digits than its factorization.

1531140761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182223.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1531140761 is about 39129.7937766097. The cubic root of 1531140761 is about 1152.5816634131.

The spelling of 1531140761 in words is "one billion, five hundred thirty-one million, one hundred forty thousand, seven hundred sixty-one".