11215505400 has 96 divisors (see below), whose sum is σ = 37928822400. Its totient is φ = 2718908800.

The previous prime is 11215505369. The next prime is 11215505419. The reversal of 11215505400 is 450551211.

It is a super-2 number, since 2×11215505400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 843060 + ... + 856259.

It is an arithmetic number, because the mean of its divisors is an integer number (395091900).

Almost surely, 2^11215505400 is an apocalyptic number.

11215505400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11215505400 is an abundant number, since it is smaller than the sum of its proper divisors (26713317000).

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

11215505400 is a wasteful number, since it uses less digits than its factorization.

11215505400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699349 (or 1699340 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

It can be divided in two parts, 11215 and 505400, that added together give a palindrome (516615).

The spelling of 11215505400 in words is "eleven billion, two hundred fifteen million, five hundred five thousand, four hundred".