151621243 has 2 divisors, whose sum is σ = 151621244. Its totient is φ = 151621242.

The previous prime is 151621241. The next prime is 151621271. The reversal of 151621243 is 342126151.

It is a happy number.

151621243 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 is an emirp because it is prime and its reverse (342126151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151621243 - 2¹ = 151621241 is a prime.

Together with 151621241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (151621241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75810621 + 75810622.

It is an arithmetic number, because the mean of its divisors is an integer number (75810622).

Almost surely, 2^151621243 is an apocalyptic number.

151621243 is a deficient number, since it is larger than the sum of its proper divisors (1).

151621243 is an equidigital number, since it uses as much as digits as its factorization.

151621243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 151621243 is about 12313.4578003094. The cubic root of 151621243 is about 533.2366821820.

Adding to 151621243 its reverse (342126151), we get a palindrome (493747394).

The spelling of 151621243 in words is "one hundred fifty-one million, six hundred twenty-one thousand, two hundred forty-three".