1315701561 has 8 divisors (see below), whose sum is σ = 1762136320. Its totient is φ = 873200592.

The previous prime is 1315701547. The next prime is 1315701571. The reversal of 1315701561 is 1651075131.

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

It is not a de Polignac number, because 1315701561 - 2¹³ = 1315693369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315701571) 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, 982666 + ... + 984003.

It is an arithmetic number, because the mean of its divisors is an integer number (220267040).

Almost surely, 2^1315701561 is an apocalyptic number.

It is an amenable number.

1315701561 is a deficient number, since it is larger than the sum of its proper divisors (446434759).

1315701561 is a wasteful number, since it uses less digits than its factorization.

1315701561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966895.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 1315701561 is about 36272.6006925338. The cubic root of 1315701561 is about 1095.7693032232.

Adding to 1315701561 its reverse (1651075131), we get a palindrome (2966776692).

The spelling of 1315701561 in words is "one billion, three hundred fifteen million, seven hundred one thousand, five hundred sixty-one".