215036436451 has 4 divisors (see below), whose sum is σ = 215169258600. Its totient is φ = 214903614304.

The previous prime is 215036436427. The next prime is 215036436491. The reversal of 215036436451 is 154634630512.

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 215036436451 - 2¹⁹ = 215035912163 is a prime.

It is a super-2 number, since 2×215036436451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215036436491) 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, 66408646 + ... + 66411883.

It is an arithmetic number, because the mean of its divisors is an integer number (53792314650).

Almost surely, 2^215036436451 is an apocalyptic number.

215036436451 is a deficient number, since it is larger than the sum of its proper divisors (132822149).

215036436451 is a wasteful number, since it uses less digits than its factorization.

215036436451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132822148.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 215036436451 in words is "two hundred fifteen billion, thirty-six million, four hundred thirty-six thousand, four hundred fifty-one".