621106051 has 2 divisors, whose sum is σ = 621106052. Its totient is φ = 621106050.

The previous prime is 621106027. The next prime is 621106091. The reversal of 621106051 is 150601126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621106051 - 2⁹ = 621105539 is a prime.

It is not a weakly prime, because it can be changed into another prime (621106001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310553025 + 310553026.

It is an arithmetic number, because the mean of its divisors is an integer number (310553026).

Almost surely, 2^621106051 is an apocalyptic number.

621106051 is a deficient number, since it is larger than the sum of its proper divisors (1).

621106051 is an equidigital number, since it uses as much as digits as its factorization.

621106051 is an evil number, because the sum of its binary digits is even.

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

The square root of 621106051 is about 24921.9993379343. Note that the first 3 decimals coincide. The cubic root of 621106051 is about 853.2086572035.

Adding to 621106051 its reverse (150601126), we get a palindrome (771707177).

The spelling of 621106051 in words is "six hundred twenty-one million, one hundred six thousand, fifty-one".