1314531191 has 4 divisors (see below), whose sum is σ = 1314706032. Its totient is φ = 1314356352.

The previous prime is 1314531149. The next prime is 1314531233. The reversal of 1314531191 is 1911354131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1314531149) and next prime (1314531233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1314531191 is a prime.

It is a super-2 number, since 2×1314531191² = 3455984504223756962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1314531091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75611 + ... + 91356.

It is an arithmetic number, because the mean of its divisors is an integer number (328676508).

Almost surely, 2^1314531191 is an apocalyptic number.

1314531191 is a deficient number, since it is larger than the sum of its proper divisors (174841).

1314531191 is an equidigital number, since it uses as much as digits as its factorization.

1314531191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174840.

The product of its digits is 1620, while the sum is 29.

The square root of 1314531191 is about 36256.4641271043. The cubic root of 1314531191 is about 1095.4442963952. Note that the first 3 decimals are identical.

The spelling of 1314531191 in words is "one billion, three hundred fourteen million, five hundred thirty-one thousand, one hundred ninety-one".