161524947 has 16 divisors (see below), whose sum is σ = 231528960. Its totient is φ = 99843552.

The previous prime is 161524907. The next prime is 161524963. The reversal of 161524947 is 749425161.

It is a de Polignac number, because none of the positive numbers 2^k-161524947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161524907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27468 + ... + 32825.

It is an arithmetic number, because the mean of its divisors is an integer number (14470560).

Almost surely, 2^161524947 is an apocalyptic number.

161524947 is a deficient number, since it is larger than the sum of its proper divisors (70004013).

161524947 is a wasteful number, since it uses less digits than its factorization.

161524947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60362.

The product of its digits is 60480, while the sum is 39.

The square root of 161524947 is about 12709.2465158246. The cubic root of 161524947 is about 544.6027989910.

It can be divided in two parts, 1615 and 24947, that added together give a palindrome (26562).

The spelling of 161524947 in words is "one hundred sixty-one million, five hundred twenty-four thousand, nine hundred forty-seven".