220312436 has 6 divisors (see below), whose sum is σ = 385546770. Its totient is φ = 110156216.

The previous prime is 220312409. The next prime is 220312447. The reversal of 220312436 is 634213022.

220312436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 193210000 + 27102436 = 13900^2 + 5206^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27539051 + ... + 27539058.

It is an arithmetic number, because the mean of its divisors is an integer number (64257795).

Almost surely, 2^220312436 is an apocalyptic number.

It is an amenable number.

220312436 is a deficient number, since it is larger than the sum of its proper divisors (165234334).

220312436 is a wasteful number, since it uses less digits than its factorization.

220312436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55078113 (or 55078111 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 220312436 is about 14842.9254528883. The cubic root of 220312436 is about 603.9667138068.

Adding to 220312436 its reverse (634213022), we get a palindrome (854525458).

The spelling of 220312436 in words is "two hundred twenty million, three hundred twelve thousand, four hundred thirty-six".