150643421 has 2 divisors, whose sum is σ = 150643422. Its totient is φ = 150643420.

The previous prime is 150643387. The next prime is 150643433. The reversal of 150643421 is 124346051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 35832196 = 10715^2 + 5986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150643421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150645421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75321710 + 75321711.

It is an arithmetic number, because the mean of its divisors is an integer number (75321711).

Almost surely, 2^150643421 is an apocalyptic number.

It is an amenable number.

150643421 is a deficient number, since it is larger than the sum of its proper divisors (1).

150643421 is an equidigital number, since it uses as much as digits as its factorization.

150643421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 150643421 is about 12273.6881580069. The cubic root of 150643421 is about 532.0879085232.

Adding to 150643421 its reverse (124346051), we get a palindrome (274989472).

The spelling of 150643421 in words is "one hundred fifty million, six hundred forty-three thousand, four hundred twenty-one".