311601601 has 4 divisors (see below), whose sum is σ = 311888304. Its totient is φ = 311314900.

The previous prime is 311601583. The next prime is 311601643. The reversal of 311601601 is 106106113.

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.

It is a cyclic number.

It is not a de Polignac number, because 311601601 - 2⁷ = 311601473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311601001) 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, 141715 + ... + 143896.

It is an arithmetic number, because the mean of its divisors is an integer number (77972076).

Almost surely, 2^311601601 is an apocalyptic number.

It is an amenable number.

311601601 is a deficient number, since it is larger than the sum of its proper divisors (286703).

311601601 is a wasteful number, since it uses less digits than its factorization.

311601601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286702.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 311601601 is about 17652.2406793019. The cubic root of 311601601 is about 677.9534786201.

Adding to 311601601 its reverse (106106113), we get a palindrome (417707714).

It can be divided in two parts, 31160 and 1601, that added together give a square (32761 = 181²).

The spelling of 311601601 in words is "three hundred eleven million, six hundred one thousand, six hundred one".