1601731431 has 12 divisors (see below), whose sum is σ = 2414204208. Its totient is φ = 1021393824.

The previous prime is 1601731429. The next prime is 1601731433. The reversal of 1601731431 is 1341371061.

1601731431 is a `hidden beast` number, since 1 + 60 + 173 + 1 + 431 = 666.

It is an interprime number because it is at equal distance from previous prime (1601731429) and next prime (1601731433).

It is not a de Polignac number, because 1601731431 - 2¹ = 1601731429 is a prime.

It is a super-2 number, since 2×1601731431² = 5131087154106615522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1601731395 and 1601731404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601731433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3868710 + ... + 3869123.

It is an arithmetic number, because the mean of its divisors is an integer number (201183684).

Almost surely, 2^1601731431 is an apocalyptic number.

1601731431 is a deficient number, since it is larger than the sum of its proper divisors (812472777).

1601731431 is a wasteful number, since it uses less digits than its factorization.

1601731431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7737862 (or 7737859 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1601731431 is about 40021.6370354837. The cubic root of 1601731431 is about 1170.0288377727.

It can be divided in two parts, 160173 and 1431, that added together give a square (161604 = 402²).

The spelling of 1601731431 in words is "one billion, six hundred one million, seven hundred thirty-one thousand, four hundred thirty-one".