1431603161 has 4 divisors (see below), whose sum is σ = 1449724800. Its totient is φ = 1413481524.

The previous prime is 1431603119. The next prime is 1431603163. The reversal of 1431603161 is 1613061341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1431603161 - 2⁶ = 1431603097 is a prime.

It is a super-2 number, since 2×1431603161² = 4098975221170383842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1431603161.

It is not an unprimeable number, because it can be changed into a prime (1431603163) 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, 9060701 + ... + 9060858.

It is an arithmetic number, because the mean of its divisors is an integer number (362431200).

Almost surely, 2^1431603161 is an apocalyptic number.

It is an amenable number.

1431603161 is a deficient number, since it is larger than the sum of its proper divisors (18121639).

1431603161 is an equidigital number, since it uses as much as digits as its factorization.

1431603161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18121638.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1431603161 is about 37836.5320953176. The cubic root of 1431603161 is about 1127.0440300278.

The spelling of 1431603161 in words is "one billion, four hundred thirty-one million, six hundred three thousand, one hundred sixty-one".