151204221 has 12 divisors (see below), whose sum is σ = 249607072. Its totient is φ = 86402376.

The previous prime is 151204213. The next prime is 151204253. The reversal of 151204221 is 122402151.

It is not a de Polignac number, because 151204221 - 2³ = 151204213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151204194 and 151204203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151204201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1199971 + ... + 1200096.

Almost surely, 2^151204221 is an apocalyptic number.

It is an amenable number.

151204221 is a deficient number, since it is larger than the sum of its proper divisors (98402851).

151204221 is a wasteful number, since it uses less digits than its factorization.

151204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400080 (or 2400077 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 151204221 is about 12296.5125543790. The cubic root of 151204221 is about 532.7473584634.

Adding to 151204221 its reverse (122402151), we get a palindrome (273606372).

The spelling of 151204221 in words is "one hundred fifty-one million, two hundred four thousand, two hundred twenty-one".