151312534421 has 4 divisors (see below), whose sum is σ = 151327932492. Its totient is φ = 151297136352.

The previous prime is 151312534333. The next prime is 151312534441. The reversal of 151312534421 is 124435213151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124435213151 = 29 ⋅4290869419.

It can be written as a sum of positive squares in 2 ways, for example, as 85255824196 + 66056710225 = 291986^2 + 257015^2 .

It is a cyclic number.

It is not a de Polignac number, because 151312534421 - 2¹⁰ = 151312533397 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 (151312534441) 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, 7684286 + ... + 7703951.

It is an arithmetic number, because the mean of its divisors is an integer number (37831983123).

Almost surely, 2^151312534421 is an apocalyptic number.

It is an amenable number.

151312534421 is a deficient number, since it is larger than the sum of its proper divisors (15398071).

151312534421 is an equidigital number, since it uses as much as digits as its factorization.

151312534421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15398070.

The product of its digits is 14400, while the sum is 32.

Adding to 151312534421 its reverse (124435213151), we get a palindrome (275747747572).

The spelling of 151312534421 in words is "one hundred fifty-one billion, three hundred twelve million, five hundred thirty-four thousand, four hundred twenty-one".