621432259 has 36 divisors (see below), whose sum is σ = 781203240. Its totient is φ = 492886296.

The previous prime is 621432199. The next prime is 621432281. The reversal of 621432259 is 952234126.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a de Polignac number, because none of the positive numbers 2^k-621432259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621432299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14451892 + ... + 14451934.

It is an arithmetic number, because the mean of its divisors is an integer number (21700090).

Almost surely, 2^621432259 is an apocalyptic number.

621432259 is a deficient number, since it is larger than the sum of its proper divisors (159770981).

621432259 is an frugal number, since it uses more digits than its factorization.

621432259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 69 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 621432259 is about 24928.5430581091. The cubic root of 621432259 is about 853.3580008772.

The spelling of 621432259 in words is "six hundred twenty-one million, four hundred thirty-two thousand, two hundred fifty-nine".