215454111515342 has 16 divisors (see below), whose sum is σ = 369350441199072. Its totient is φ = 92337342427680.

The previous prime is 215454111515207. The next prime is 215454111515347. The reversal of 215454111515342 is 243515111454512.

It is a junction number, because it is equal to n+sod(n) for n = 215454111515293 and 215454111515302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215454111515347) 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, 835409 + ... + 20775132.

It is an arithmetic number, because the mean of its divisors is an integer number (23084402574942).

Almost surely, 2^{215454111515342} is an apocalyptic number.

215454111515342 is a deficient number, since it is larger than the sum of its proper divisors (153896329683730).

215454111515342 is a wasteful number, since it uses less digits than its factorization.

215454111515342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22322683.

The product of its digits is 480000, while the sum is 44.

Adding to 215454111515342 its reverse (243515111454512), we get a palindrome (458969222969854).

The spelling of 215454111515342 in words is "two hundred fifteen trillion, four hundred fifty-four billion, one hundred eleven million, five hundred fifteen thousand, three hundred forty-two".