42154410521 has 8 divisors (see below), whose sum is σ = 42336891840. Its totient is φ = 41972241168.

The previous prime is 42154410491. The next prime is 42154410539. The reversal of 42154410521 is 12501445124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42154410521 - 2⁶ = 42154410457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42154410581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194900 + ... + 349706.

It is an arithmetic number, because the mean of its divisors is an integer number (5292111480).

Almost surely, 2^42154410521 is an apocalyptic number.

It is an amenable number.

42154410521 is a deficient number, since it is larger than the sum of its proper divisors (182481319).

42154410521 is a wasteful number, since it uses less digits than its factorization.

42154410521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155983.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 42154410521 its reverse (12501445124), we get a palindrome (54655855645).

The spelling of 42154410521 in words is "forty-two billion, one hundred fifty-four million, four hundred ten thousand, five hundred twenty-one".