163394511031 has 4 divisors (see below), whose sum is σ = 164681082112. Its totient is φ = 162107939952.

The previous prime is 163394511023. The next prime is 163394511047. The reversal of 163394511031 is 130115493361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163394511031 - 2³ = 163394511023 is a prime.

It is a super-2 number, since 2×163394511031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163394518031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643285350 + ... + 643285603.

It is an arithmetic number, because the mean of its divisors is an integer number (41170270528).

Almost surely, 2^163394511031 is an apocalyptic number.

163394511031 is a deficient number, since it is larger than the sum of its proper divisors (1286571081).

163394511031 is a wasteful number, since it uses less digits than its factorization.

163394511031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286571080.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 163394511031 in words is "one hundred sixty-three billion, three hundred ninety-four million, five hundred eleven thousand, thirty-one".