1506531139 has 2 divisors, whose sum is σ = 1506531140. Its totient is φ = 1506531138.

The previous prime is 1506531133. The next prime is 1506531151. The reversal of 1506531139 is 9311356051.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9311356051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1506531139 - 2⁵ = 1506531107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1506531133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 753265569 + 753265570.

It is an arithmetic number, because the mean of its divisors is an integer number (753265570).

Almost surely, 2^1506531139 is an apocalyptic number.

1506531139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1506531139 is an equidigital number, since it uses as much as digits as its factorization.

1506531139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 1506531139 is about 38814.0585226539. The cubic root of 1506531139 is about 1146.3732343729.

The spelling of 1506531139 in words is "one billion, five hundred six million, five hundred thirty-one thousand, one hundred thirty-nine".