215534132255451 has 8 divisors (see below), whose sum is σ = 294388083080784. Its totient is φ = 140184801466880.

The previous prime is 215534132255411. The next prime is 215534132255513. The reversal of 215534132255451 is 154552231435512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215534132255451 - 2⁹ = 215534132254939 is a prime.

It is a super-2 number, since 2×215534132255451² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215534132255451.

It is not an unprimeable number, because it can be changed into a prime (215534132255411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876155009046 + ... + 876155009291.

It is an arithmetic number, because the mean of its divisors is an integer number (36798510385098).

Almost surely, 2^{215534132255451} is an apocalyptic number.

215534132255451 is a deficient number, since it is larger than the sum of its proper divisors (78853950825333).

215534132255451 is a wasteful number, since it uses less digits than its factorization.

215534132255451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752310018381.

The product of its digits is 3600000, while the sum is 48.

The spelling of 215534132255451 in words is "two hundred fifteen trillion, five hundred thirty-four billion, one hundred thirty-two million, two hundred fifty-five thousand, four hundred fifty-one".