1531109137 has 2 divisors, whose sum is σ = 1531109138. Its totient is φ = 1531109136.

The previous prime is 1531109101. The next prime is 1531109159. The reversal of 1531109137 is 7319011351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345495761 + 185613376 = 36681^2 + 13624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531109137 - 2⁷ = 1531109009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531109099 and 1531109108.

It is not a weakly prime, because it can be changed into another prime (1531109537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765554568 + 765554569.

It is an arithmetic number, because the mean of its divisors is an integer number (765554569).

Almost surely, 2^1531109137 is an apocalyptic number.

It is an amenable number.

1531109137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531109137 is an equidigital number, since it uses as much as digits as its factorization.

1531109137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 1531109137 is about 39129.3896834592. The cubic root of 1531109137 is about 1152.5737282634.

The spelling of 1531109137 in words is "one billion, five hundred thirty-one million, one hundred nine thousand, one hundred thirty-seven".