215404553451 has 8 divisors (see below), whose sum is σ = 290049696144. Its totient is φ = 142181223200.

The previous prime is 215404553401. The next prime is 215404553489. The reversal of 215404553451 is 154355404512.

215404553451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215404553451 - 2⁹ = 215404552939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215404553401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355452756 + ... + 355453361.

It is an arithmetic number, because the mean of its divisors is an integer number (36256212018).

Almost surely, 2^215404553451 is an apocalyptic number.

215404553451 is a deficient number, since it is larger than the sum of its proper divisors (74645142693).

215404553451 is a wasteful number, since it uses less digits than its factorization.

215404553451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710906221.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 215404553451 its reverse (154355404512), we get a palindrome (369759957963).

The spelling of 215404553451 in words is "two hundred fifteen billion, four hundred four million, five hundred fifty-three thousand, four hundred fifty-one".