151231151987 has 4 divisors (see below), whose sum is σ = 151333961856. Its totient is φ = 151128342120.

The previous prime is 151231151983. The next prime is 151231152013. The reversal of 151231151987 is 789151132151.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 151231151987 - 2² = 151231151983 is a prime.

It is a super-2 number, since 2×151231151987² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151231151983) 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, 51402728 + ... + 51405669.

It is an arithmetic number, because the mean of its divisors is an integer number (37833490464).

Almost surely, 2^151231151987 is an apocalyptic number.

151231151987 is a deficient number, since it is larger than the sum of its proper divisors (102809869).

151231151987 is a wasteful number, since it uses less digits than its factorization.

151231151987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102809868.

The product of its digits is 75600, while the sum is 44.

The spelling of 151231151987 in words is "one hundred fifty-one billion, two hundred thirty-one million, one hundred fifty-one thousand, nine hundred eighty-seven".