150621643 has 2 divisors, whose sum is σ = 150621644. Its totient is φ = 150621642.

The previous prime is 150621613. The next prime is 150621671. The reversal of 150621643 is 346126051.

It is an a-pointer prime, because the next prime (150621671) can be obtained adding 150621643 to its sum of digits (28).

It is a strong prime.

It is an emirp because it is prime and its reverse (346126051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150621643 is a prime.

It is not a weakly prime, because it can be changed into another prime (150621613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75310821 + 75310822.

It is an arithmetic number, because the mean of its divisors is an integer number (75310822).

Almost surely, 2^150621643 is an apocalyptic number.

150621643 is a deficient number, since it is larger than the sum of its proper divisors (1).

150621643 is an equidigital number, since it uses as much as digits as its factorization.

150621643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 150621643 is about 12272.8009435499. The cubic root of 150621643 is about 532.0622665826.

Adding to 150621643 its reverse (346126051), we get a palindrome (496747694).

The spelling of 150621643 in words is "one hundred fifty million, six hundred twenty-one thousand, six hundred forty-three".