1315531404 has 36 divisors (see below), whose sum is σ = 3627678600. Its totient is φ = 398645760.

The previous prime is 1315531333. The next prime is 1315531433. The reversal of 1315531404 is 4041355131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1315531404² = 3461245749820422432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1660629 + ... + 1661420.

It is an arithmetic number, because the mean of its divisors is an integer number (100768850).

Almost surely, 2^1315531404 is an apocalyptic number.

It is an amenable number.

1315531404 is an abundant number, since it is smaller than the sum of its proper divisors (2312147196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1315531404 is a wasteful number, since it uses less digits than its factorization.

1315531404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322070 (or 3322065 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1315531404 is about 36270.2550859516. The cubic root of 1315531404 is about 1095.7220633168.

Adding to 1315531404 its reverse (4041355131), we get a palindrome (5356886535).

The spelling of 1315531404 in words is "one billion, three hundred fifteen million, five hundred thirty-one thousand, four hundred four".