151543621 has 2 divisors, whose sum is σ = 151543622. Its totient is φ = 151543620.

The previous prime is 151543583. The next prime is 151543631. The reversal of 151543621 is 126345151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148498596 + 3045025 = 12186^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 151543621 - 2¹¹ = 151541573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151543621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151543631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75771810 + 75771811.

It is an arithmetic number, because the mean of its divisors is an integer number (75771811).

Almost surely, 2^151543621 is an apocalyptic number.

It is an amenable number.

151543621 is a deficient number, since it is larger than the sum of its proper divisors (1).

151543621 is an equidigital number, since it uses as much as digits as its factorization.

151543621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

The square root of 151543621 is about 12310.3054795565. The cubic root of 151543621 is about 533.1456703901.

Adding to 151543621 its reverse (126345151), we get a palindrome (277888772).

The spelling of 151543621 in words is "one hundred fifty-one million, five hundred forty-three thousand, six hundred twenty-one".