151131021442 has 4 divisors (see below), whose sum is σ = 226696532166. Its totient is φ = 75565510720.

The previous prime is 151131021407. The next prime is 151131021451. The reversal of 151131021442 is 244120131151.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 114718367401 + 36412654041 = 338701^2 + 190821^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37782755359 + ... + 37782755362.

Almost surely, 2^151131021442 is an apocalyptic number.

151131021442 is a deficient number, since it is larger than the sum of its proper divisors (75565510724).

151131021442 is an equidigital number, since it uses as much as digits as its factorization.

151131021442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75565510723.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 151131021442 its reverse (244120131151), we get a palindrome (395251152593).

The spelling of 151131021442 in words is "one hundred fifty-one billion, one hundred thirty-one million, twenty-one thousand, four hundred forty-two".