621516201 has 16 divisors (see below), whose sum is σ = 882819840. Its totient is φ = 387804240.

The previous prime is 621516199. The next prime is 621516227. The reversal of 621516201 is 102615126.

It is not a de Polignac number, because 621516201 - 2¹ = 621516199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621516271) 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, 60955 + ... + 70416.

It is an arithmetic number, because the mean of its divisors is an integer number (55176240).

Almost surely, 2^621516201 is an apocalyptic number.

It is an amenable number.

621516201 is a deficient number, since it is larger than the sum of its proper divisors (261303639).

621516201 is a wasteful number, since it uses less digits than its factorization.

621516201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131476.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 621516201 is about 24930.2266536027. The cubic root of 621516201 is about 853.3964225240.

The spelling of 621516201 in words is "six hundred twenty-one million, five hundred sixteen thousand, two hundred one".