215454025351 has 4 divisors (see below), whose sum is σ = 215460950472. Its totient is φ = 215447100232.

The previous prime is 215454025331. The next prime is 215454025439. The reversal of 215454025351 is 153520454512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215454025351 - 2⁷ = 215454025223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215454025351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215454025331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3415681 + ... + 3478186.

It is an arithmetic number, because the mean of its divisors is an integer number (53865237618).

Almost surely, 2^215454025351 is an apocalyptic number.

215454025351 is a deficient number, since it is larger than the sum of its proper divisors (6925121).

215454025351 is an equidigital number, since it uses as much as digits as its factorization.

215454025351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925120.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 215454025351 its reverse (153520454512), we get a palindrome (368974479863).

The spelling of 215454025351 in words is "two hundred fifteen billion, four hundred fifty-four million, twenty-five thousand, three hundred fifty-one".