331277493 has 4 divisors (see below), whose sum is σ = 441703328. Its totient is φ = 220851660.

The previous prime is 331277477. The next prime is 331277503. The reversal of 331277493 is 394772133.

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 not a de Polignac number, because 331277493 - 2⁴ = 331277477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331277423) 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, 55212913 + ... + 55212918.

It is an arithmetic number, because the mean of its divisors is an integer number (110425832).

Almost surely, 2^331277493 is an apocalyptic number.

It is an amenable number.

331277493 is a deficient number, since it is larger than the sum of its proper divisors (110425835).

331277493 is a wasteful number, since it uses less digits than its factorization.

331277493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110425834.

The product of its digits is 95256, while the sum is 39.

The square root of 331277493 is about 18201.0299983270. The cubic root of 331277493 is about 691.9328937176.

The spelling of 331277493 in words is "three hundred thirty-one million, two hundred seventy-seven thousand, four hundred ninety-three".