53531520143 has 4 divisors (see below), whose sum is σ = 53535846480. Its totient is φ = 53527193808.

The previous prime is 53531520121. The next prime is 53531520169. The reversal of 53531520143 is 34102513535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53531520143 - 2⁸ = 53531519887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53531520443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144555 + ... + 2169372.

It is an arithmetic number, because the mean of its divisors is an integer number (13383961620).

Almost surely, 2^53531520143 is an apocalyptic number.

53531520143 is a deficient number, since it is larger than the sum of its proper divisors (4326337).

53531520143 is a wasteful number, since it uses less digits than its factorization.

53531520143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326336.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 53531520143 in words is "fifty-three billion, five hundred thirty-one million, five hundred twenty thousand, one hundred forty-three".