163161631 has 8 divisors (see below), whose sum is σ = 173111904. Its totient is φ = 153250560.

The previous prime is 163161629. The next prime is 163161637. The reversal of 163161631 is 136161361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163161631 - 2¹ = 163161629 is a prime.

It is a super-2 number, since 2×163161631² = 53243435661160322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163161631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163161637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990 + ... + 18091.

It is an arithmetic number, because the mean of its divisors is an integer number (21638988).

Almost surely, 2^163161631 is an apocalyptic number.

163161631 is a deficient number, since it is larger than the sum of its proper divisors (9950273).

163161631 is a wasteful number, since it uses less digits than its factorization.

163161631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19601.

The product of its digits is 1944, while the sum is 28.

The square root of 163161631 is about 12773.4737248722. The cubic root of 163161631 is about 546.4360533747.

The spelling of 163161631 in words is "one hundred sixty-three million, one hundred sixty-one thousand, six hundred thirty-one".