1601253731 has 16 divisors (see below), whose sum is σ = 2014046208. Its totient is φ = 1236681600.

The previous prime is 1601253707. The next prime is 1601253733. The reversal of 1601253731 is 1373521061.

It is not a de Polignac number, because 1601253731 - 2²² = 1597059427 is a prime.

It is a super-2 number, since 2×1601253731² = 5128027022082840722, 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 = 1601253694 and 1601253703.

It is not an unprimeable number, because it can be changed into a prime (1601253733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83315 + ... + 100716.

It is an arithmetic number, because the mean of its divisors is an integer number (125877888).

Almost surely, 2^1601253731 is an apocalyptic number.

1601253731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1601253731 is a deficient number, since it is larger than the sum of its proper divisors (412792477).

1601253731 is a wasteful number, since it uses less digits than its factorization.

1601253731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184162.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1601253731 is about 40015.6685686994. The cubic root of 1601253731 is about 1169.9125098335.

Adding to 1601253731 its reverse (1373521061), we get a palindrome (2974774792).

The spelling of 1601253731 in words is "one billion, six hundred one million, two hundred fifty-three thousand, seven hundred thirty-one".