1531136485 has 8 divisors (see below), whose sum is σ = 1837844856. Its totient is φ = 1224588480.

The previous prime is 1531136483. The next prime is 1531136521. The reversal of 1531136485 is 5846311351.

It can be written as a sum of positive squares in 4 ways, for example, as 32982049 + 1498154436 = 5743^2 + 38706^2 .

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

It is not a de Polignac number, because 1531136485 - 2¹ = 1531136483 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 (1531136483) 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, 17974 + ... + 58183.

It is an arithmetic number, because the mean of its divisors is an integer number (229730607).

Almost surely, 2^1531136485 is an apocalyptic number.

It is an amenable number.

1531136485 is a deficient number, since it is larger than the sum of its proper divisors (306708371).

1531136485 is an equidigital number, since it uses as much as digits as its factorization.

1531136485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80183.

The product of its digits is 43200, while the sum is 37.

The square root of 1531136485 is about 39129.7391378987. The cubic root of 1531136485 is about 1152.5805904781.

The spelling of 1531136485 in words is "one billion, five hundred thirty-one million, one hundred thirty-six thousand, four hundred eighty-five".