151520531421 has 16 divisors (see below), whose sum is σ = 230898694784. Its totient is φ = 86579311104.

The previous prime is 151520531411. The next prime is 151520531473. The reversal of 151520531421 is 124135025151.

It is not a de Polignac number, because 151520531421 - 2²¹ = 151518434269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151520531401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362841 + ... + 659313.

It is an arithmetic number, because the mean of its divisors is an integer number (14431168424).

Almost surely, 2^151520531421 is an apocalyptic number.

It is an amenable number.

151520531421 is a deficient number, since it is larger than the sum of its proper divisors (79378163363).

151520531421 is a wasteful number, since it uses less digits than its factorization.

151520531421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320820.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 151520531421 its reverse (124135025151), we get a palindrome (275655556572).

The spelling of 151520531421 in words is "one hundred fifty-one billion, five hundred twenty million, five hundred thirty-one thousand, four hundred twenty-one".