1315531995 has 32 divisors (see below), whose sum is σ = 2233640448. Its totient is φ = 658871808.

The previous prime is 1315531993. The next prime is 1315532033. The reversal of 1315531995 is 5991355131.

It is not a de Polignac number, because 1315531995 - 2¹ = 1315531993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1315531991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113562 + ... + 124608.

It is an arithmetic number, because the mean of its divisors is an integer number (69801264).

Almost surely, 2^1315531995 is an apocalyptic number.

1315531995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1315531995 is a deficient number, since it is larger than the sum of its proper divisors (918108453).

1315531995 is a wasteful number, since it uses less digits than its factorization.

1315531995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11539.

The product of its digits is 91125, while the sum is 42.

The square root of 1315531995 is about 36270.2632331225. The cubic root of 1315531995 is about 1095.7222274005.

It can be divided in two parts, 13155 and 31995, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 1315531995 in words is "one billion, three hundred fifteen million, five hundred thirty-one thousand, nine hundred ninety-five".