1531738161 has 16 divisors (see below), whose sum is σ = 2285572800. Its totient is φ = 1013809824.

The previous prime is 1531738151. The next prime is 1531738171. The reversal of 1531738161 is 1618371351.

It is an interprime number because it is at equal distance from previous prime (1531738151) and next prime (1531738171).

It is not a de Polignac number, because 1531738161 - 2²⁹ = 994867249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1531738141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200316 + ... + 207821.

It is an arithmetic number, because the mean of its divisors is an integer number (142848300).

Almost surely, 2^1531738161 is an apocalyptic number.

It is an amenable number.

1531738161 is a deficient number, since it is larger than the sum of its proper divisors (753834639).

1531738161 is a wasteful number, since it uses less digits than its factorization.

1531738161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408285 (or 408279 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 1531738161 is about 39137.4266016559. The cubic root of 1531738161 is about 1152.7315435488.

The spelling of 1531738161 in words is "one billion, five hundred thirty-one million, seven hundred thirty-eight thousand, one hundred sixty-one".