621253207 has 16 divisors (see below), whose sum is σ = 667358208. Its totient is φ = 576908640.

The previous prime is 621253189. The next prime is 621253223. The reversal of 621253207 is 702352126.

It is not a de Polignac number, because 621253207 - 2¹¹ = 621251159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621253267) 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, 169282 + ... + 172912.

It is an arithmetic number, because the mean of its divisors is an integer number (41709888).

Almost surely, 2^621253207 is an apocalyptic number.

621253207 is a deficient number, since it is larger than the sum of its proper divisors (46105001).

621253207 is a wasteful number, since it uses less digits than its factorization.

621253207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 621253207 is about 24924.9514944363. The cubic root of 621253207 is about 853.2760342419.

It can be divided in two parts, 621 and 253207, that added together give a triangular number (253828 = T₇₁₂).

The spelling of 621253207 in words is "six hundred twenty-one million, two hundred fifty-three thousand, two hundred seven".