53120021523 has 8 divisors (see below), whose sum is σ = 71476482000. Its totient is φ = 35088454368.

The previous prime is 53120021503. The next prime is 53120021543. The reversal of 53120021523 is 32512002135.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53120021503) and next prime (53120021543).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53120021523 - 2¹⁷ = 53119890451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53120021493 and 53120021502.

It is not an unprimeable number, because it can be changed into a prime (53120021503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81222948 + ... + 81223601.

It is an arithmetic number, because the mean of its divisors is an integer number (8934560250).

Almost surely, 2^53120021523 is an apocalyptic number.

53120021523 is a deficient number, since it is larger than the sum of its proper divisors (18356460477).

53120021523 is a wasteful number, since it uses less digits than its factorization.

53120021523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162446661.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 53120021523 its reverse (32512002135), we get a palindrome (85632023658).

The spelling of 53120021523 in words is "fifty-three billion, one hundred twenty million, twenty-one thousand, five hundred twenty-three".