161412431 has 4 divisors (see below), whose sum is σ = 161441952. Its totient is φ = 161382912.

The previous prime is 161412409. The next prime is 161412437. The reversal of 161412431 is 134214161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134214161 = 701 ⋅191461.

It is a cyclic number.

It is not a de Polignac number, because 161412431 - 2¹⁰ = 161411407 is a prime.

It is a super-2 number, since 2×161412431² = 52107945762659522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161412397 and 161412406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161412437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3890 + ... + 18383.

It is an arithmetic number, because the mean of its divisors is an integer number (40360488).

Almost surely, 2^161412431 is an apocalyptic number.

161412431 is a deficient number, since it is larger than the sum of its proper divisors (29521).

161412431 is an equidigital number, since it uses as much as digits as its factorization.

161412431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29520.

The product of its digits is 576, while the sum is 23.

The square root of 161412431 is about 12704.8192037510. The cubic root of 161412431 is about 544.4763154080.

Adding to 161412431 its reverse (134214161), we get a palindrome (295626592).

The spelling of 161412431 in words is "one hundred sixty-one million, four hundred twelve thousand, four hundred thirty-one".