215454717241 has 3 divisors (see below), whose sum is σ = 215455181413. Its totient is φ = 215454253070.

The previous prime is 215454717229. The next prime is 215454717251. The reversal of 215454717241 is 142717454512.

The square root of 215454717241 is 464171.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 215454717241 - 2³⁵ = 181094978873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215454717251) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 232086 + ... + 696256.

Almost surely, 2^215454717241 is an apocalyptic number.

215454717241 is the 464171-st square number.

215454717241 is the 232086-th centered octagonal number.

It is an amenable number.

215454717241 is a deficient number, since it is larger than the sum of its proper divisors (464172).

215454717241 is an frugal number, since it uses more digits than its factorization.

215454717241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928342 (or 464171 counting only the distinct ones).

The product of its digits is 313600, while the sum is 43.

The spelling of 215454717241 in words is "two hundred fifteen billion, four hundred fifty-four million, seven hundred seventeen thousand, two hundred forty-one".