1601128431 has 32 divisors (see below), whose sum is σ = 2712952320. Its totient is φ = 914239872.

The previous prime is 1601128411. The next prime is 1601128447. The reversal of 1601128431 is 1348211061.

It is a happy number.

1601128431 is a `hidden beast` number, since 1 + 601 + 1 + 28 + 4 + 31 = 666.

It is not a de Polignac number, because 1601128431 - 2¹⁵ = 1601095663 is a prime.

It is a super-2 number, since 2×1601128431² = 5127224505113043522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1601128395 and 1601128404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601128411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351736 + ... + 356258.

It is an arithmetic number, because the mean of its divisors is an integer number (84779760).

Almost surely, 2^1601128431 is an apocalyptic number.

1601128431 is a deficient number, since it is larger than the sum of its proper divisors (1111823889).

1601128431 is a wasteful number, since it uses less digits than its factorization.

1601128431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6412 (or 6406 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1601128431 is about 40014.1029013522. The cubic root of 1601128431 is about 1169.8819933579.

Adding to 1601128431 its reverse (1348211061), we get a palindrome (2949339492).

The spelling of 1601128431 in words is "one billion, six hundred one million, one hundred twenty-eight thousand, four hundred thirty-one".