53145172242 has 54 divisors (see below), whose sum is σ = 117036460359. Its totient is φ = 17429136120.

The previous prime is 53145172219. The next prime is 53145172253. The reversal of 53145172242 is 24227154135.

53145172242 is a `hidden beast` number, since 531 + 4 + 51 + 72 + 2 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26572586121 + 26572586121 = 163011^2 + 163011^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=163011.

It is a junction number, because it is equal to n+sod(n) for n = 53145172197 and 53145172206.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 65530017 + ... + 65530827.

Almost surely, 2^53145172242 is an apocalyptic number.

53145172242 is an abundant number, since it is smaller than the sum of its proper divisors (63891288117).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53145172242 is an frugal number, since it uses more digits than its factorization.

53145172242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 883 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The spelling of 53145172242 in words is "fifty-three billion, one hundred forty-five million, one hundred seventy-two thousand, two hundred forty-two".