51648143 has 2 divisors, whose sum is σ = 51648144. Its totient is φ = 51648142.

The previous prime is 51648131. The next prime is 51648173. The reversal of 51648143 is 34184615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51648143 - 2⁴ = 51648127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51648173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25824071 + 25824072.

It is an arithmetic number, because the mean of its divisors is an integer number (25824072).

Almost surely, 2^51648143 is an apocalyptic number.

51648143 is a deficient number, since it is larger than the sum of its proper divisors (1).

51648143 is an equidigital number, since it uses as much as digits as its factorization.

51648143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 51648143 is about 7186.6642470621. The cubic root of 51648143 is about 372.4073441904.

The spelling of 51648143 in words is "fifty-one million, six hundred forty-eight thousand, one hundred forty-three".