331620023 has 4 divisors (see below), whose sum is σ = 378994320. Its totient is φ = 284245728.

The previous prime is 331620019. The next prime is 331620043. The reversal of 331620023 is 320026133.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 331620023 - 2² = 331620019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331619977 and 331620004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331620043) 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, 23687138 + ... + 23687151.

It is an arithmetic number, because the mean of its divisors is an integer number (94748580).

Almost surely, 2^331620023 is an apocalyptic number.

331620023 is a deficient number, since it is larger than the sum of its proper divisors (47374297).

331620023 is an equidigital number, since it uses as much as digits as its factorization.

331620023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47374296.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 331620023 is about 18210.4371995842. The cubic root of 331620023 is about 692.1712901676.

Adding to 331620023 its reverse (320026133), we get a palindrome (651646156).

The spelling of 331620023 in words is "three hundred thirty-one million, six hundred twenty thousand, twenty-three".