215543134530400 has 144 divisors (see below), whose sum is σ = 557417096303760. Its totient is φ = 81159251097600.

The previous prime is 215543134530329. The next prime is 215543134530431. The reversal of 215543134530400 is 4035431345512.

It is a super-2 number, since 2×215543134530400² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 42774331 + ... + 47547130.

It is an arithmetic number, because the mean of its divisors is an integer number (3870952057665).

Almost surely, 2^{215543134530400} is an apocalyptic number.

215543134530400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215543134530400 is an abundant number, since it is smaller than the sum of its proper divisors (341873961773360).

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

215543134530400 is a wasteful number, since it uses less digits than its factorization.

215543134530400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90321657 (or 90321644 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

Adding to 215543134530400 its reverse (4035431345512), we get a palindrome (219578565875912).

The spelling of 215543134530400 in words is "two hundred fifteen trillion, five hundred forty-three billion, one hundred thirty-four million, five hundred thirty thousand, four hundred".