1985331 has 4 divisors (see below), whose sum is σ = 2647112. Its totient is φ = 1323552.

The previous prime is 1985317. The next prime is 1985363. The reversal of 1985331 is 1335891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1335891 = 3 ⋅445297.

It is not a de Polignac number, because 1985331 - 2¹³ = 1977139 is a prime.

It is a super-2 number, since 2×1985331² = 7883078359122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1984331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330886 + ... + 330891.

It is an arithmetic number, because the mean of its divisors is an integer number (661778).

2^1985331 is an apocalyptic number.

1985331 is a deficient number, since it is larger than the sum of its proper divisors (661781).

1985331 is an equidigital number, since it uses as much as digits as its factorization.

1985331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661780.

The product of its digits is 3240, while the sum is 30.

The square root of 1985331 is about 1409.0177429685. The cubic root of 1985331 is about 125.6833191265.

The spelling of 1985331 in words is "one million, nine hundred eighty-five thousand, three hundred thirty-one".