52120453531 has 4 divisors (see below), whose sum is σ = 52143922864. Its totient is φ = 52096984200.

The previous prime is 52120453513. The next prime is 52120453537. The reversal of 52120453531 is 13535402125.

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 52120453531 - 2¹³ = 52120445339 is a prime.

It is a super-2 number, since 2×52120453531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52120453493 and 52120453502.

It is not an unprimeable number, because it can be changed into a prime (52120453537) 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, 11731335 + ... + 11735776.

It is an arithmetic number, because the mean of its divisors is an integer number (13035980716).

Almost surely, 2^52120453531 is an apocalyptic number.

52120453531 is a deficient number, since it is larger than the sum of its proper divisors (23469333).

52120453531 is a wasteful number, since it uses less digits than its factorization.

52120453531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23469332.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 52120453531 its reverse (13535402125), we get a palindrome (65655855656).

The spelling of 52120453531 in words is "fifty-two billion, one hundred twenty million, four hundred fifty-three thousand, five hundred thirty-one".