50621861 has 2 divisors, whose sum is σ = 50621862. Its totient is φ = 50621860.

The previous prime is 50621843. The next prime is 50621863. The reversal of 50621861 is 16812605.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50324836 + 297025 = 7094^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 50621861 - 2⁶ = 50621797 is a prime.

It is a super-2 number, since 2×50621861² = 5125145622206642, which contains 22 as substring.

Together with 50621863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50621863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25310930 + 25310931.

It is an arithmetic number, because the mean of its divisors is an integer number (25310931).

Almost surely, 2^50621861 is an apocalyptic number.

It is an amenable number.

50621861 is a deficient number, since it is larger than the sum of its proper divisors (1).

50621861 is an equidigital number, since it uses as much as digits as its factorization.

50621861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 50621861 is about 7114.9041455244. The cubic root of 50621861 is about 369.9241651252.

The spelling of 50621861 in words is "fifty million, six hundred twenty-one thousand, eight hundred sixty-one".