331897061 has 4 divisors (see below), whose sum is σ = 346327392. Its totient is φ = 317466732.

The previous prime is 331897057. The next prime is 331897063. The reversal of 331897061 is 160798133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160798133 = 137 ⋅1173709.

It is a cyclic number.

It is not a de Polignac number, because 331897061 - 2² = 331897057 is a prime.

It is a super-2 number, since 2×331897061² = 220311318200875442, 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 (331897063) 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, 7215131 + ... + 7215176.

It is an arithmetic number, because the mean of its divisors is an integer number (86581848).

Almost surely, 2^331897061 is an apocalyptic number.

It is an amenable number.

331897061 is a deficient number, since it is larger than the sum of its proper divisors (14430331).

331897061 is a wasteful number, since it uses less digits than its factorization.

331897061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14430330.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 331897061 is about 18218.0421835059. The cubic root of 331897061 is about 692.3639849817.

The spelling of 331897061 in words is "three hundred thirty-one million, eight hundred ninety-seven thousand, sixty-one".