505251255451 has 8 divisors (see below), whose sum is σ = 506636064000. Its totient is φ = 503866719720.

The previous prime is 505251255433. The next prime is 505251255461. The reversal of 505251255451 is 154552152505.

It is a happy number.

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 505251255451 - 2²⁹ = 504714384539 is a prime.

It is a super-2 number, since 2×505251255451² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505251255461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3966450 + ... + 4091848.

It is an arithmetic number, because the mean of its divisors is an integer number (63329508000).

Almost surely, 2^505251255451 is an apocalyptic number.

505251255451 is a deficient number, since it is larger than the sum of its proper divisors (1384808549).

505251255451 is a wasteful number, since it uses less digits than its factorization.

505251255451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136409.

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 505251255451 in words is "five hundred five billion, two hundred fifty-one million, two hundred fifty-five thousand, four hundred fifty-one".