15331601 has 2 divisors, whose sum is σ = 15331602. Its totient is φ = 15331600.

The previous prime is 15331597. The next prime is 15331619. The reversal of 15331601 is 10613351.

It is a happy number.

15331601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13315201 + 2016400 = 3649^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 15331601 - 2² = 15331597 is a prime.

It is not a weakly prime, because it can be changed into another prime (15331621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7665800 + 7665801.

It is an arithmetic number, because the mean of its divisors is an integer number (7665801).

Almost surely, 2^15331601 is an apocalyptic number.

It is an amenable number.

15331601 is a deficient number, since it is larger than the sum of its proper divisors (1).

15331601 is an equidigital number, since it uses as much as digits as its factorization.

15331601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 15331601 is about 3915.5588362327. The cubic root of 15331601 is about 248.4253075329.

Adding to 15331601 its reverse (10613351), we get a palindrome (25944952).

The spelling of 15331601 in words is "fifteen million, three hundred thirty-one thousand, six hundred one".