161634031 has 8 divisors (see below), whose sum is σ = 179682944. Its totient is φ = 144387360.

The previous prime is 161634017. The next prime is 161634049. The reversal of 161634031 is 130436161.

It is a happy number.

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

It is not a de Polignac number, because 161634031 - 2⁹ = 161633519 is a prime.

It is a super-2 number, since 2×161634031² = 52251119954617922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161633987 and 161634005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161634061) 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, 200136 + ... + 200941.

It is an arithmetic number, because the mean of its divisors is an integer number (22460368).

Almost surely, 2^161634031 is an apocalyptic number.

161634031 is a deficient number, since it is larger than the sum of its proper divisors (18048913).

161634031 is a wasteful number, since it uses less digits than its factorization.

161634031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401121.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 161634031 is about 12713.5373126443. The cubic root of 161634031 is about 544.7253684650.

The spelling of 161634031 in words is "one hundred sixty-one million, six hundred thirty-four thousand, thirty-one".