1318400531 has 8 divisors (see below), whose sum is σ = 1510015584. Its totient is φ = 1127603520.

The previous prime is 1318400509. The next prime is 1318400533. The reversal of 1318400531 is 1350048131.

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

It is a cyclic number.

It is not a de Polignac number, because 1318400531 - 2¹⁴ = 1318384147 is a prime.

It is a super-2 number, since 2×1318400531² = 3476359920282163922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1318400531.

It is not an unprimeable number, because it can be changed into a prime (1318400533) 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, 201050 + ... + 207503.

It is an arithmetic number, because the mean of its divisors is an integer number (188751948).

Almost surely, 2^1318400531 is an apocalyptic number.

1318400531 is a deficient number, since it is larger than the sum of its proper divisors (191615053).

1318400531 is an equidigital number, since it uses as much as digits as its factorization.

1318400531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409021.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1318400531 is about 36309.7856093919. The cubic root of 1318400531 is about 1096.5180618088.

Adding to 1318400531 its reverse (1350048131), we get a palindrome (2668448662).

The spelling of 1318400531 in words is "one billion, three hundred eighteen million, four hundred thousand, five hundred thirty-one".