311997461 has 16 divisors (see below), whose sum is σ = 343943040. Its totient is φ = 281698560.

The previous prime is 311997437. The next prime is 311997473. The reversal of 311997461 is 164799113.

It is not a de Polignac number, because 311997461 - 2⁶ = 311997397 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 (311997661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135641 + ... + 137921.

It is an arithmetic number, because the mean of its divisors is an integer number (21496440).

Almost surely, 2^311997461 is an apocalyptic number.

It is an amenable number.

311997461 is a deficient number, since it is larger than the sum of its proper divisors (31945579).

311997461 is a wasteful number, since it uses less digits than its factorization.

311997461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its digits is 40824, while the sum is 41.

The square root of 311997461 is about 17663.4498612247. The cubic root of 311997461 is about 678.2404487932.

The spelling of 311997461 in words is "three hundred eleven million, nine hundred ninety-seven thousand, four hundred sixty-one".