253405513145 has 8 divisors (see below), whose sum is σ = 306777648456. Its totient is φ = 200930388736.

The previous prime is 253405513133. The next prime is 253405513159. The reversal of 253405513145 is 541315504352.

It can be written as a sum of positive squares in 4 ways, for example, as 31364764201 + 222040748944 = 177101^2 + 471212^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253405513145 - 2¹⁰ = 253405512121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253405513099 and 253405513108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224252102 + ... + 224253231.

It is an arithmetic number, because the mean of its divisors is an integer number (38347206057).

Almost surely, 2^253405513145 is an apocalyptic number.

It is an amenable number.

253405513145 is a deficient number, since it is larger than the sum of its proper divisors (53372135311).

253405513145 is a wasteful number, since it uses less digits than its factorization.

253405513145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448505451.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 253405513145 in words is "two hundred fifty-three billion, four hundred five million, five hundred thirteen thousand, one hundred forty-five".