151236521 has 2 divisors, whose sum is σ = 151236522. Its totient is φ = 151236520.

The previous prime is 151236517. The next prime is 151236551. The reversal of 151236521 is 125632151.

151236521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113720896 + 37515625 = 10664^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 151236521 - 2² = 151236517 is a prime.

It is not a weakly prime, because it can be changed into another prime (151236511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75618260 + 75618261.

It is an arithmetic number, because the mean of its divisors is an integer number (75618261).

Almost surely, 2^151236521 is an apocalyptic number.

It is an amenable number.

151236521 is a deficient number, since it is larger than the sum of its proper divisors (1).

151236521 is an equidigital number, since it uses as much as digits as its factorization.

151236521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 151236521 is about 12297.8258647616. The cubic root of 151236521 is about 532.7852906376.

Adding to 151236521 its reverse (125632151), we get a palindrome (276868672).

The spelling of 151236521 in words is "one hundred fifty-one million, two hundred thirty-six thousand, five hundred twenty-one".