151044221 has 2 divisors, whose sum is σ = 151044222. Its totient is φ = 151044220.

The previous prime is 151044217. The next prime is 151044233. The reversal of 151044221 is 122440151.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151044100 + 121 = 12290^2 + 11^2 .

It is an emirp because it is prime and its reverse (122440151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151044221 - 2² = 151044217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 151044193 and 151044202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151044241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75522110 + 75522111.

It is an arithmetic number, because the mean of its divisors is an integer number (75522111).

Almost surely, 2^151044221 is an apocalyptic number.

It is an amenable number.

151044221 is a deficient number, since it is larger than the sum of its proper divisors (1).

151044221 is an equidigital number, since it uses as much as digits as its factorization.

151044221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 151044221 is about 12290.0049227004. The cubic root of 151044221 is about 532.5593794496.

Adding to 151044221 its reverse (122440151), we get a palindrome (273484372).

The spelling of 151044221 in words is "one hundred fifty-one million, forty-four thousand, two hundred twenty-one".