151531351021 has 4 divisors (see below), whose sum is σ = 151733124544. Its totient is φ = 151329577500.

The previous prime is 151531351019. The next prime is 151531351039. The reversal of 151531351021 is 120153135151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 151531351021 - 2¹ = 151531351019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151531301021) 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, 100885635 + ... + 100887136.

It is an arithmetic number, because the mean of its divisors is an integer number (37933281136).

Almost surely, 2^151531351021 is an apocalyptic number.

It is an amenable number.

151531351021 is a deficient number, since it is larger than the sum of its proper divisors (201773523).

151531351021 is an equidigital number, since it uses as much as digits as its factorization.

151531351021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201773522.

The product of its (nonzero) digits is 2250, while the sum is 28.

Adding to 151531351021 its reverse (120153135151), we get a palindrome (271684486172).

The spelling of 151531351021 in words is "one hundred fifty-one billion, five hundred thirty-one million, three hundred fifty-one thousand, twenty-one".