215026465451 has 4 divisors (see below), whose sum is σ = 245744531952. Its totient is φ = 184308398952.

The previous prime is 215026465361. The next prime is 215026465463. The reversal of 215026465451 is 154564620512.

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 215026465451 - 2²⁶ = 214959356587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215026465399 and 215026465408.

It is not an unprimeable number, because it can be changed into a prime (215026465051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15359033240 + ... + 15359033253.

It is an arithmetic number, because the mean of its divisors is an integer number (61436132988).

Almost surely, 2^215026465451 is an apocalyptic number.

215026465451 is a deficient number, since it is larger than the sum of its proper divisors (30718066501).

215026465451 is an equidigital number, since it uses as much as digits as its factorization.

215026465451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30718066500.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 215026465451 in words is "two hundred fifteen billion, twenty-six million, four hundred sixty-five thousand, four hundred fifty-one".