621612201 has 8 divisors (see below), whose sum is σ = 947218624. Its totient is φ = 355206960.

The previous prime is 621612197. The next prime is 621612239. The reversal of 621612201 is 102216126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 621612201 - 2² = 621612197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 29600581 = 621612201 / (6 + 2 + 1 + 6 + 1 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621610201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14800270 + ... + 14800311.

It is an arithmetic number, because the mean of its divisors is an integer number (118402328).

Almost surely, 2^621612201 is an apocalyptic number.

It is an amenable number.

621612201 is a deficient number, since it is larger than the sum of its proper divisors (325606423).

621612201 is a wasteful number, since it uses less digits than its factorization.

621612201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29600591.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 621612201 is about 24932.1519528500. The cubic root of 621612201 is about 853.4403590771.

Adding to 621612201 its reverse (102216126), we get a palindrome (723828327).

The spelling of 621612201 in words is "six hundred twenty-one million, six hundred twelve thousand, two hundred one".