151420142521 has 4 divisors (see below), whose sum is σ = 151422880000. Its totient is φ = 151417405044.

The previous prime is 151420142501. The next prime is 151420142543. The reversal of 151420142521 is 125241024151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125241024151 = 43 ⋅2912581957.

It is a cyclic number.

It is not a de Polignac number, because 151420142521 - 2³⁷ = 13981189049 is a prime.

It is a super-2 number, since 2×151420142521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151420142521.

It is not an unprimeable number, because it can be changed into a prime (151420142501) 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, 1284021 + ... + 1396978.

It is an arithmetic number, because the mean of its divisors is an integer number (37855720000).

Almost surely, 2^151420142521 is an apocalyptic number.

It is an amenable number.

151420142521 is a deficient number, since it is larger than the sum of its proper divisors (2737479).

151420142521 is an equidigital number, since it uses as much as digits as its factorization.

151420142521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737478.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 151420142521 its reverse (125241024151), we get a palindrome (276661166672).

The spelling of 151420142521 in words is "one hundred fifty-one billion, four hundred twenty million, one hundred forty-two thousand, five hundred twenty-one".