49211621 has 2 divisors, whose sum is σ = 49211622. Its totient is φ = 49211620.

The previous prime is 49211599. The next prime is 49211623. The reversal of 49211621 is 12611294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 20802721 = 5330^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 49211621 - 2²² = 45017317 is a prime.

It is a Sophie Germain prime.

Together with 49211623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49211623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24605810 + 24605811.

It is an arithmetic number, because the mean of its divisors is an integer number (24605811).

Almost surely, 2^49211621 is an apocalyptic number.

It is an amenable number.

49211621 is a deficient number, since it is larger than the sum of its proper divisors (1).

49211621 is an equidigital number, since it uses as much as digits as its factorization.

49211621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 49211621 is about 7015.0995003635. The cubic root of 49211621 is about 366.4566075981.

The spelling of 49211621 in words is "forty-nine million, two hundred eleven thousand, six hundred twenty-one".