53261531 has 4 divisors (see below), whose sum is σ = 53287872. Its totient is φ = 53235192.

The previous prime is 53261521. The next prime is 53261539. The reversal of 53261531 is 13516235.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53261531 is a prime.

It is a super-2 number, since 2×53261531² = 5673581368927922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53261531.

It is not an unprimeable number, because it can be changed into a prime (53261539) 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, 9860 + ... + 14273.

It is an arithmetic number, because the mean of its divisors is an integer number (13321968).

Almost surely, 2^53261531 is an apocalyptic number.

53261531 is a deficient number, since it is larger than the sum of its proper divisors (26341).

53261531 is a wasteful number, since it uses less digits than its factorization.

53261531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26340.

The product of its digits is 2700, while the sum is 26.

The square root of 53261531 is about 7298.0498079967. The cubic root of 53261531 is about 376.2454142331.

Adding to 53261531 its reverse (13516235), we get a palindrome (66777766).

The spelling of 53261531 in words is "fifty-three million, two hundred sixty-one thousand, five hundred thirty-one".