161315622 has 24 divisors (see below), whose sum is σ = 376403664. Its totient is φ = 49635504.

The previous prime is 161315593. The next prime is 161315633. The reversal of 161315622 is 226513161.

161315622 is a `hidden beast` number, since 1 + 6 + 1 + 31 + 5 + 622 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344458 + ... + 344925.

It is an arithmetic number, because the mean of its divisors is an integer number (15683486).

Almost surely, 2^161315622 is an apocalyptic number.

161315622 is an abundant number, since it is smaller than the sum of its proper divisors (215088042).

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

161315622 is a wasteful number, since it uses less digits than its factorization.

161315622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689404 (or 689401 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161315622 is about 12701.0087000994. The cubic root of 161315622 is about 544.3674416187.

Adding to 161315622 its reverse (226513161), we get a palindrome (387828783).

The spelling of 161315622 in words is "one hundred sixty-one million, three hundred fifteen thousand, six hundred twenty-two".