42150205251 has 32 divisors (see below), whose sum is σ = 77853196800. Its totient is φ = 21896209440.

The previous prime is 42150205249. The next prime is 42150205259. The reversal of 42150205251 is 15250205124.

It is not a de Polignac number, because 42150205251 - 2¹ = 42150205249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42150205259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10135056 + ... + 10139213.

It is an arithmetic number, because the mean of its divisors is an integer number (2432912400).

Almost surely, 2^42150205251 is an apocalyptic number.

42150205251 is a deficient number, since it is larger than the sum of its proper divisors (35702991549).

42150205251 is a wasteful number, since it uses less digits than its factorization.

42150205251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20274296 (or 20274290 counting only the distinct ones).

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

The spelling of 42150205251 in words is "forty-two billion, one hundred fifty million, two hundred five thousand, two hundred fifty-one".