1313151765 has 48 divisors (see below), whose sum is σ = 2219488128. Its totient is φ = 661702272.

The previous prime is 1313151761. The next prime is 1313151781. The reversal of 1313151765 is 5671513131.

It is not a de Polignac number, because 1313151765 - 2² = 1313151761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313151761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6665647 + ... + 6665843.

It is an arithmetic number, because the mean of its divisors is an integer number (46239336).

Almost surely, 2^1313151765 is an apocalyptic number.

1313151765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1313151765 is a deficient number, since it is larger than the sum of its proper divisors (906336363).

1313151765 is a wasteful number, since it uses less digits than its factorization.

1313151765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 367 counting only the distinct ones).

The product of its digits is 9450, while the sum is 33.

The square root of 1313151765 is about 36237.4359606195. The cubic root of 1313151765 is about 1095.0609878252.

Adding to 1313151765 its reverse (5671513131), we get a palindrome (6984664896).

The spelling of 1313151765 in words is "one billion, three hundred thirteen million, one hundred fifty-one thousand, seven hundred sixty-five".