161216134 has 16 divisors (see below), whose sum is σ = 258694128. Its totient is φ = 75082752.

The previous prime is 161216119. The next prime is 161216149. The reversal of 161216134 is 431612161.

It is an interprime number because it is at equal distance from previous prime (161216119) and next prime (161216149).

It is a junction number, because it is equal to n+sod(n) for n = 161216099 and 161216108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21144 + ... + 27739.

It is an arithmetic number, because the mean of its divisors is an integer number (16168383).

Almost surely, 2^161216134 is an apocalyptic number.

161216134 is a deficient number, since it is larger than the sum of its proper divisors (97477994).

161216134 is a wasteful number, since it uses less digits than its factorization.

161216134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48999.

The product of its digits is 864, while the sum is 25.

The square root of 161216134 is about 12697.0915567306. The cubic root of 161216134 is about 544.2555095674.

Adding to 161216134 its reverse (431612161), we get a palindrome (592828295).

The spelling of 161216134 in words is "one hundred sixty-one million, two hundred sixteen thousand, one hundred thirty-four".