161245822 has 16 divisors (see below), whose sum is σ = 246836160. Its totient is φ = 78972192.

The previous prime is 161245817. The next prime is 161245871. The reversal of 161245822 is 228542161.

It is a super-2 number, since 2×161245822² = 52000430224911368, 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 7 ways as a sum of consecutive naturals, for example, 112603 + ... + 114025.

It is an arithmetic number, because the mean of its divisors is an integer number (15427260).

Almost surely, 2^161245822 is an apocalyptic number.

161245822 is a deficient number, since it is larger than the sum of its proper divisors (85590338).

161245822 is a wasteful number, since it uses less digits than its factorization.

161245822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547.

The product of its digits is 7680, while the sum is 31.

The square root of 161245822 is about 12698.2605895453. The cubic root of 161245822 is about 544.2889157893.

Adding to 161245822 its reverse (228542161), we get a palindrome (389787983).

The spelling of 161245822 in words is "one hundred sixty-one million, two hundred forty-five thousand, eight hundred twenty-two".