621016051 has 4 divisors (see below), whose sum is σ = 631196704. Its totient is φ = 610835400.

The previous prime is 621016013. The next prime is 621016061. The reversal of 621016051 is 150610126.

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 621016051 - 2⁹ = 621015539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621016061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5090235 + ... + 5090356.

It is an arithmetic number, because the mean of its divisors is an integer number (157799176).

Almost surely, 2^621016051 is an apocalyptic number.

621016051 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

621016051 is a deficient number, since it is larger than the sum of its proper divisors (10180653).

621016051 is a wasteful number, since it uses less digits than its factorization.

621016051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10180652.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 621016051 is about 24920.1936388945. The cubic root of 621016051 is about 853.1674444411.

Adding to 621016051 its reverse (150610126), we get a palindrome (771626177).

The spelling of 621016051 in words is "six hundred twenty-one million, sixteen thousand, fifty-one".