53405422521 has 16 divisors (see below), whose sum is σ = 79575265728. Its totient is φ = 31577484800.

The previous prime is 53405422513. The next prime is 53405422537. The reversal of 53405422521 is 12522450435.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 53405422521 - 2³ = 53405422513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (53405422541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19734576 + ... + 19737281.

It is an arithmetic number, because the mean of its divisors is an integer number (4973454108).

Almost surely, 2^53405422521 is an apocalyptic number.

It is an amenable number.

53405422521 is a deficient number, since it is larger than the sum of its proper divisors (26169843207).

53405422521 is a wasteful number, since it uses less digits than its factorization.

53405422521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39471912.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 53405422521 its reverse (12522450435), we get a palindrome (65927872956).

The spelling of 53405422521 in words is "fifty-three billion, four hundred five million, four hundred twenty-two thousand, five hundred twenty-one".