161368431 has 8 divisors (see below), whose sum is σ = 245894784. Its totient is φ = 92210520.

The previous prime is 161368421. The next prime is 161368439. The reversal of 161368431 is 134863161.

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

It is not a de Polignac number, because 161368431 - 2⁶ = 161368367 is a prime.

It is a super-2 number, since 2×161368431² = 52079541046803522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161368392 and 161368401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161368439) 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, 3842085 + ... + 3842126.

It is an arithmetic number, because the mean of its divisors is an integer number (30736848).

Almost surely, 2^161368431 is an apocalyptic number.

161368431 is a deficient number, since it is larger than the sum of its proper divisors (84526353).

161368431 is an equidigital number, since it uses as much as digits as its factorization.

161368431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7684221.

The product of its digits is 10368, while the sum is 33.

The square root of 161368431 is about 12703.0874593541. The cubic root of 161368431 is about 544.4268373207.

The spelling of 161368431 in words is "one hundred sixty-one million, three hundred sixty-eight thousand, four hundred thirty-one".