53423215081 has 2 divisors, whose sum is σ = 53423215082. Its totient is φ = 53423215080.

The previous prime is 53423215067. The next prime is 53423215117. The reversal of 53423215081 is 18051232435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53183739456 + 239475625 = 230616^2 + 15475^2 .

It is a cyclic number.

It is not a de Polignac number, because 53423215081 - 2²¹ = 53421117929 is a prime.

It is a super-2 number, since 2×53423215081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53423215031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26711607540 + 26711607541.

It is an arithmetic number, because the mean of its divisors is an integer number (26711607541).

Almost surely, 2^53423215081 is an apocalyptic number.

It is an amenable number.

53423215081 is a deficient number, since it is larger than the sum of its proper divisors (1).

53423215081 is an equidigital number, since it uses as much as digits as its factorization.

53423215081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 53423215081 in words is "fifty-three billion, four hundred twenty-three million, two hundred fifteen thousand, eighty-one".