620455231 has 4 divisors (see below), whose sum is σ = 676860264. Its totient is φ = 564050200.

The previous prime is 620455219. The next prime is 620455237. The reversal of 620455231 is 132554026.

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 620455231 - 2¹³ = 620447039 is a prime.

It is a super-2 number, since 2×620455231² = 769929387350526722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 620455231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620455237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28202500 + ... + 28202521.

It is an arithmetic number, because the mean of its divisors is an integer number (169215066).

Almost surely, 2^620455231 is an apocalyptic number.

620455231 is a deficient number, since it is larger than the sum of its proper divisors (56405033).

620455231 is a wasteful number, since it uses less digits than its factorization.

620455231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56405032.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 620455231 is about 24908.9387770736. The cubic root of 620455231 is about 852.9105442267.

It can be divided in two parts, 62045 and 5231, that added together give a palindrome (67276).

The spelling of 620455231 in words is "six hundred twenty million, four hundred fifty-five thousand, two hundred thirty-one".