53211971 has 2 divisors, whose sum is σ = 53211972. Its totient is φ = 53211970.

The previous prime is 53211967. The next prime is 53212007. The reversal of 53211971 is 17911235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53211971 - 2² = 53211967 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53211901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26605985 + 26605986.

It is an arithmetic number, because the mean of its divisors is an integer number (26605986).

Almost surely, 2^53211971 is an apocalyptic number.

53211971 is a deficient number, since it is larger than the sum of its proper divisors (1).

53211971 is an equidigital number, since it uses as much as digits as its factorization.

53211971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 29.

The square root of 53211971 is about 7294.6535901302. The cubic root of 53211971 is about 376.1286788898.

The spelling of 53211971 in words is "fifty-three million, two hundred eleven thousand, nine hundred seventy-one".