331400061 has 6 divisors (see below), whose sum is σ = 478688990. Its totient is φ = 220933368.

The previous prime is 331400059. The next prime is 331400087. The reversal of 331400061 is 160004133.

It can be written as a sum of positive squares in only one way, i.e., 240560100 + 90839961 = 15510^2 + 9531^2 .

It is not a de Polignac number, because 331400061 - 2¹ = 331400059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331400161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18411106 + ... + 18411123.

Almost surely, 2^331400061 is an apocalyptic number.

It is an amenable number.

331400061 is a deficient number, since it is larger than the sum of its proper divisors (147288929).

331400061 is a wasteful number, since it uses less digits than its factorization.

331400061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36822235 (or 36822232 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331400061 is about 18204.3967491373. The cubic root of 331400061 is about 692.0182183327.

Adding to 331400061 its reverse (160004133), we get a palindrome (491404194).

The spelling of 331400061 in words is "three hundred thirty-one million, four hundred thousand, sixty-one".