620313331 has 16 divisors (see below), whose sum is σ = 689384448. Its totient is φ = 553399200.

The previous prime is 620313329. The next prime is 620313341. The reversal of 620313331 is 133313026.

It is a cyclic number.

It is not a de Polignac number, because 620313331 - 2¹ = 620313329 is a prime.

It is a super-2 number, since 2×620313331² = 769577257232631122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620313301) 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, 406536 + ... + 408058.

It is an arithmetic number, because the mean of its divisors is an integer number (43086528).

Almost surely, 2^620313331 is an apocalyptic number.

620313331 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

620313331 is a deficient number, since it is larger than the sum of its proper divisors (69071117).

620313331 is a wasteful number, since it uses less digits than its factorization.

620313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 620313331 is about 24906.0902391363. The cubic root of 620313331 is about 852.8455181900.

Adding to 620313331 its reverse (133313026), we get a palindrome (753626357).

The spelling of 620313331 in words is "six hundred twenty million, three hundred thirteen thousand, three hundred thirty-one".