421355240015 has 16 divisors (see below), whose sum is σ = 523442887200. Its totient is φ = 325223402112.

The previous prime is 421355239999. The next prime is 421355240087. The reversal of 421355240015 is 510042553124.

It is a cyclic number.

It is not a de Polignac number, because 421355240015 - 2⁴ = 421355239999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859145 + ... + 1257314.

It is an arithmetic number, because the mean of its divisors is an integer number (32715180450).

Almost surely, 2^421355240015 is an apocalyptic number.

421355240015 is a deficient number, since it is larger than the sum of its proper divisors (102087647185).

421355240015 is a wasteful number, since it uses less digits than its factorization.

421355240015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117866.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 421355240015 its reverse (510042553124), we get a palindrome (931397793139).

The spelling of 421355240015 in words is "four hundred twenty-one billion, three hundred fifty-five million, two hundred forty thousand, fifteen".