42054421515 has 8 divisors (see below), whose sum is σ = 67287074448. Its totient is φ = 22429024800.

The previous prime is 42054421499. The next prime is 42054421531. The reversal of 42054421515 is 51512445024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42054421499) and next prime (42054421531).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42054421515 - 2⁴ = 42054421499 is a prime.

It is a super-2 number, since 2×42054421515² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401814036 + ... + 1401814065.

It is an arithmetic number, because the mean of its divisors is an integer number (8410884306).

Almost surely, 2^42054421515 is an apocalyptic number.

42054421515 is a deficient number, since it is larger than the sum of its proper divisors (25232652933).

42054421515 is a wasteful number, since it uses less digits than its factorization.

42054421515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803628109.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 42054421515 its reverse (51512445024), we get a palindrome (93566866539).

The spelling of 42054421515 in words is "forty-two billion, fifty-four million, four hundred twenty-one thousand, five hundred fifteen".