511157225052 has 48 divisors (see below), whose sum is σ = 1325265978400. Its totient is φ = 170380143360.

The previous prime is 511157224987. The next prime is 511157225063. The reversal of 511157225052 is 250522751115.

511157225052 is a `hidden beast` number, since 5 + 1 + 11 + 572 + 25 + 0 + 52 = 666.

It is a super-2 number, since 2×511157225052² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 511157224998 and 511157225016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427274 + ... + 4541262.

Almost surely, 2^511157225052 is an apocalyptic number.

It is an amenable number.

511157225052 is an abundant number, since it is smaller than the sum of its proper divisors (814108753348).

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

511157225052 is a wasteful number, since it uses less digits than its factorization.

511157225052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155523 (or 155515 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 36.

Adding to 511157225052 its reverse (250522751115), we get a palindrome (761679976167).

The spelling of 511157225052 in words is "five hundred eleven billion, one hundred fifty-seven million, two hundred twenty-five thousand, fifty-two".