151631131522 has 8 divisors (see below), whose sum is σ = 244942597116. Its totient is φ = 69983599152.

The previous prime is 151631131507. The next prime is 151631131523. The reversal of 151631131522 is 225131136151.

It can be written as a sum of positive squares in 2 ways, for example, as 151104015841 + 527115681 = 388721^2 + 22959^2 .

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

It is not an unprimeable number, because it can be changed into a prime (151631131523) 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, 2915983273 + ... + 2915983324.

Almost surely, 2^151631131522 is an apocalyptic number.

151631131522 is a deficient number, since it is larger than the sum of its proper divisors (93311465594).

151631131522 is a wasteful number, since it uses less digits than its factorization.

151631131522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831966612.

The product of its digits is 5400, while the sum is 31.

Adding to 151631131522 its reverse (225131136151), we get a palindrome (376762267673).

The spelling of 151631131522 in words is "one hundred fifty-one billion, six hundred thirty-one million, one hundred thirty-one thousand, five hundred twenty-two".