53445120251 has 4 divisors (see below), whose sum is σ = 56588950872. Its totient is φ = 50301289632.

The previous prime is 53445120221. The next prime is 53445120257. The reversal of 53445120251 is 15202154435.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53445120251 - 2³⁴ = 36265251067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53445120257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571915285 + ... + 1571915318.

It is an arithmetic number, because the mean of its divisors is an integer number (14147237718).

Almost surely, 2^53445120251 is an apocalyptic number.

53445120251 is a deficient number, since it is larger than the sum of its proper divisors (3143830621).

53445120251 is a wasteful number, since it uses less digits than its factorization.

53445120251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143830620.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 53445120251 its reverse (15202154435), we get a palindrome (68647274686).

The spelling of 53445120251 in words is "fifty-three billion, four hundred forty-five million, one hundred twenty thousand, two hundred fifty-one".