1220526164 has 48 divisors (see below), whose sum is σ = 2525502336. Its totient is φ = 508809600.

The previous prime is 1220526143. The next prime is 1220526179. The reversal of 1220526164 is 4616250221.

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, 83009 + ... + 96599.

It is an arithmetic number, because the mean of its divisors is an integer number (52614632).

Almost surely, 2^1220526164 is an apocalyptic number.

It is an amenable number.

1220526164 is an abundant number, since it is smaller than the sum of its proper divisors (1304976172).

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

1220526164 is a wasteful number, since it uses less digits than its factorization.

1220526164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13776 (or 13774 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1220526164 is about 34936.0295969648. The cubic root of 1220526164 is about 1068.6833206054.

Adding to 1220526164 its reverse (4616250221), we get a palindrome (5836776385).

The spelling of 1220526164 in words is "one billion, two hundred twenty million, five hundred twenty-six thousand, one hundred sixty-four".