215045451 has 24 divisors (see below), whose sum is σ = 325621296. Its totient is φ = 136604160.

The previous prime is 215045387. The next prime is 215045491. The reversal of 215045451 is 154540512.

215045451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215045451 - 2⁶ = 215045387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215045491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9091 + ... + 22643.

It is an arithmetic number, because the mean of its divisors is an integer number (13567554).

Almost surely, 2^215045451 is an apocalyptic number.

215045451 is a deficient number, since it is larger than the sum of its proper divisors (110575845).

215045451 is a wasteful number, since it uses less digits than its factorization.

215045451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13643 (or 13640 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 215045451 is about 14664.4280829496. The cubic root of 215045451 is about 599.1148531673.

Adding to 215045451 its reverse (154540512), we get a palindrome (369585963).

It can be divided in two parts, 215045 and 451, that added together give a triangular number (215496 = T₆₅₆).

The spelling of 215045451 in words is "two hundred fifteen million, forty-five thousand, four hundred fifty-one".