1601501231 has 8 divisors (see below), whose sum is σ = 1747384704. Its totient is φ = 1455666520.

The previous prime is 1601501227. The next prime is 1601501257. The reversal of 1601501231 is 1321051061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1601501231 - 2² = 1601501227 is a prime.

It is a super-2 number, since 2×1601501231² = 5129612385789030722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601501221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108416 + ... + 122298.

It is an arithmetic number, because the mean of its divisors is an integer number (218423088).

Almost surely, 2^1601501231 is an apocalyptic number.

1601501231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1601501231 is a deficient number, since it is larger than the sum of its proper divisors (145883473).

1601501231 is a wasteful number, since it uses less digits than its factorization.

1601501231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1601501231 is about 40018.7609878167. The cubic root of 1601501231 is about 1169.9727831105.

Adding to 1601501231 its reverse (1321051061), we get a palindrome (2922552292).

The spelling of 1601501231 in words is "one billion, six hundred one million, five hundred one thousand, two hundred thirty-one".