531250011220 has 24 divisors (see below), whose sum is σ = 1181250025704. Its totient is φ = 200000004096.

The previous prime is 531250011211. The next prime is 531250011277. The reversal of 531250011220 is 22110052135.

It can be written as a sum of positive squares in 4 ways, for example, as 303684757776 + 227565253444 = 551076^2 + 477038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 531250011191 and 531250011200.

It is a congruent number.

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, 781249677 + ... + 781250356.

It is an arithmetic number, because the mean of its divisors is an integer number (49218751071).

Almost surely, 2^531250011220 is an apocalyptic number.

It is an amenable number.

531250011220 is an abundant number, since it is smaller than the sum of its proper divisors (650000014484).

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

531250011220 is a wasteful number, since it uses less digits than its factorization.

531250011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562500059 (or 1562500057 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 531250011220 its reverse (22110052135), we get a palindrome (553360063355).

The spelling of 531250011220 in words is "five hundred thirty-one billion, two hundred fifty million, eleven thousand, two hundred twenty".