161622204 has 12 divisors (see below), whose sum is σ = 377118504. Its totient is φ = 53874064.

The previous prime is 161622137. The next prime is 161622211. The reversal of 161622204 is 402226161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×161622204² = 52243473651635232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6734247 + ... + 6734270.

It is an arithmetic number, because the mean of its divisors is an integer number (31426542).

Almost surely, 2^161622204 is an apocalyptic number.

It is an amenable number.

161622204 is an abundant number, since it is smaller than the sum of its proper divisors (215496300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161622204 is a wasteful number, since it uses less digits than its factorization.

161622204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468524 (or 13468522 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 161622204 is about 12713.0721700146. The cubic root of 161622204 is about 544.7120820219.

Adding to 161622204 its reverse (402226161), we get a palindrome (563848365).

The spelling of 161622204 in words is "one hundred sixty-one million, six hundred twenty-two thousand, two hundred four".