505212115151 has 32 divisors (see below), whose sum is σ = 571651153920. Its totient is φ = 444615494400.

The previous prime is 505212115007. The next prime is 505212115153. The reversal of 505212115151 is 151511212505.

It is a cyclic number.

It is not a de Polignac number, because 505212115151 - 2¹⁸ = 505211853007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505212115153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961106 + ... + 1390736.

It is an arithmetic number, because the mean of its divisors is an integer number (17864098560).

Almost surely, 2^505212115151 is an apocalyptic number.

505212115151 is a deficient number, since it is larger than the sum of its proper divisors (66439038769).

505212115151 is a wasteful number, since it uses less digits than its factorization.

505212115151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429767.

The product of its (nonzero) digits is 2500, while the sum is 29.

Adding to 505212115151 its reverse (151511212505), we get a palindrome (656723327656).

The spelling of 505212115151 in words is "five hundred five billion, two hundred twelve million, one hundred fifteen thousand, one hundred fifty-one".