331090 has 16 divisors (see below), whose sum is σ = 603288. Its totient is φ = 130816.

The previous prime is 331081. The next prime is 331099. The reversal of 331090 is 90133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331081) and next prime (331099).

It can be written as a sum of positive squares in 4 ways, for example, as 251001 + 80089 = 501^2 + 283^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (331099) 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, 984 + ... + 1276.

2³³¹⁰⁹⁰ is an apocalyptic number.

331090 is a deficient number, since it is larger than the sum of its proper divisors (272198).

331090 is a wasteful number, since it uses less digits than its factorization.

331090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 331090 is about 575.4042057545. The cubic root of 331090 is about 69.1802331415.

The spelling of 331090 in words is "three hundred thirty-one thousand, ninety".