1600531261 has 4 divisors (see below), whose sum is σ = 1829178592. Its totient is φ = 1371883932.

The previous prime is 1600531243. The next prime is 1600531297. The reversal of 1600531261 is 1621350061.

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 1600531261 - 2¹¹ = 1600529213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600531211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114323655 + ... + 114323668.

It is an arithmetic number, because the mean of its divisors is an integer number (457294648).

Almost surely, 2^1600531261 is an apocalyptic number.

It is an amenable number.

1600531261 is a deficient number, since it is larger than the sum of its proper divisors (228647331).

1600531261 is an equidigital number, since it uses as much as digits as its factorization.

1600531261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228647330.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1600531261 is about 40006.6402113449. The cubic root of 1600531261 is about 1169.7365323425.

The spelling of 1600531261 in words is "one billion, six hundred million, five hundred thirty-one thousand, two hundred sixty-one".