42001405515 has 24 divisors (see below), whose sum is σ = 73326205680. Its totient is φ = 22239589824.

The previous prime is 42001405499. The next prime is 42001405549. The reversal of 42001405515 is 51550410024.

42001405515 is a `hidden beast` number, since 4 + 2 + 0 + 0 + 140 + 5 + 515 = 666.

It is not a de Polignac number, because 42001405515 - 2⁴ = 42001405499 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3351172 + ... + 3363681.

It is an arithmetic number, because the mean of its divisors is an integer number (3055258570).

Almost surely, 2^42001405515 is an apocalyptic number.

42001405515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42001405515 is a deficient number, since it is larger than the sum of its proper divisors (31324800165).

42001405515 is a wasteful number, since it uses less digits than its factorization.

42001405515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715003 (or 6715000 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 42001405515 its reverse (51550410024), we get a palindrome (93551815539).

The spelling of 42001405515 in words is "forty-two billion, one million, four hundred five thousand, five hundred fifteen".