215254403140542 has 64 divisors (see below), whose sum is σ = 449409390868800. Its totient is φ = 68665186529280.

The previous prime is 215254403140537. The next prime is 215254403140561. The reversal of 215254403140542 is 245041304452512.

It is a junction number, because it is equal to n+sod(n) for n = 215254403140494 and 215254403140503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376303684 + ... + 376875272.

It is an arithmetic number, because the mean of its divisors is an integer number (7022021732325).

Almost surely, 2^{215254403140542} is an apocalyptic number.

215254403140542 is an abundant number, since it is smaller than the sum of its proper divisors (234154987728258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215254403140542 is a wasteful number, since it uses less digits than its factorization.

215254403140542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599501.

The product of its (nonzero) digits is 768000, while the sum is 42.

The spelling of 215254403140542 in words is "two hundred fifteen trillion, two hundred fifty-four billion, four hundred three million, one hundred forty thousand, five hundred forty-two".