42155250051 has 4 divisors (see below), whose sum is σ = 56207000072. Its totient is φ = 28103500032.

The previous prime is 42155250037. The next prime is 42155250061. The reversal of 42155250051 is 15005255124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42155250051 - 2²² = 42151055747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42155250061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7025875006 + ... + 7025875011.

It is an arithmetic number, because the mean of its divisors is an integer number (14051750018).

Almost surely, 2^42155250051 is an apocalyptic number.

42155250051 is a deficient number, since it is larger than the sum of its proper divisors (14051750021).

42155250051 is a wasteful number, since it uses less digits than its factorization.

42155250051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14051750020.

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 42155250051 in words is "forty-two billion, one hundred fifty-five million, two hundred fifty thousand, fifty-one".