53421971 has 2 divisors, whose sum is σ = 53421972. Its totient is φ = 53421970.

The previous prime is 53421967. The next prime is 53422003. The reversal of 53421971 is 17912435.

It is an a-pointer prime, because the next prime (53422003) can be obtained adding 53421971 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53421971 - 2² = 53421967 is a prime.

It is not a weakly prime, because it can be changed into another prime (53421941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26710985 + 26710986.

It is an arithmetic number, because the mean of its divisors is an integer number (26710986).

Almost surely, 2^53421971 is an apocalyptic number.

53421971 is a deficient number, since it is larger than the sum of its proper divisors (1).

53421971 is an equidigital number, since it uses as much as digits as its factorization.

53421971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 53421971 is about 7309.0335202406. The cubic root of 53421971 is about 376.6228242321.

The spelling of 53421971 in words is "fifty-three million, four hundred twenty-one thousand, nine hundred seventy-one".