53021556473 has 2 divisors, whose sum is σ = 53021556474. Its totient is φ = 53021556472.

The previous prime is 53021556463. The next prime is 53021556509. The reversal of 53021556473 is 37465512035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50253533929 + 2768022544 = 224173^2 + 52612^2 .

It is a cyclic number.

It is not a de Polignac number, because 53021556473 - 2²⁴ = 53004779257 is a prime.

It is a super-2 number, since 2×53021556473² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53021556473.

It is not a weakly prime, because it can be changed into another prime (53021556433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26510778236 + 26510778237.

It is an arithmetic number, because the mean of its divisors is an integer number (26510778237).

Almost surely, 2^53021556473 is an apocalyptic number.

It is an amenable number.

53021556473 is a deficient number, since it is larger than the sum of its proper divisors (1).

53021556473 is an equidigital number, since it uses as much as digits as its factorization.

53021556473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 53021556473 in words is "fifty-three billion, twenty-one million, five hundred fifty-six thousand, four hundred seventy-three".