151221671 has 2 divisors, whose sum is σ = 151221672. Its totient is φ = 151221670.

The previous prime is 151221643. The next prime is 151221677. The reversal of 151221671 is 176122151.

151221671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (176122151) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151221671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151221671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151221677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75610835 + 75610836.

It is an arithmetic number, because the mean of its divisors is an integer number (75610836).

Almost surely, 2^151221671 is an apocalyptic number.

151221671 is a deficient number, since it is larger than the sum of its proper divisors (1).

151221671 is an equidigital number, since it uses as much as digits as its factorization.

151221671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 26.

The square root of 151221671 is about 12297.2220846824. Note that the first 3 decimals coincide. The cubic root of 151221671 is about 532.7678519032.

The spelling of 151221671 in words is "one hundred fifty-one million, two hundred twenty-one thousand, six hundred seventy-one".