421434240355515 has 32 divisors (see below), whose sum is σ = 689135255145792. Its totient is φ = 219858819264000.

The previous prime is 421434240355493. The next prime is 421434240355549. The reversal of 421434240355515 is 515553042434124.

It is a happy number.

It is not a de Polignac number, because 421434240355515 - 2⁶ = 421434240355451 is a prime.

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, 1272165516 + ... + 1272496745.

It is an arithmetic number, because the mean of its divisors is an integer number (21535476723306).

Almost surely, 2^{421434240355515} is an apocalyptic number.

421434240355515 is a deficient number, since it is larger than the sum of its proper divisors (267701014790277).

421434240355515 is a wasteful number, since it uses less digits than its factorization.

421434240355515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544662511.

The product of its (nonzero) digits is 5760000, while the sum is 48.

Adding to 421434240355515 its reverse (515553042434124), we get a palindrome (936987282789639).

The spelling of 421434240355515 in words is "four hundred twenty-one trillion, four hundred thirty-four billion, two hundred forty million, three hundred fifty-five thousand, five hundred fifteen".