151221204 has 36 divisors (see below), whose sum is σ = 382869760. Its totient is φ = 50325840.

The previous prime is 151221197. The next prime is 151221223. The reversal of 151221204 is 402122151.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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, 21837 + ... + 27915.

Almost surely, 2^151221204 is an apocalyptic number.

It is an amenable number.

151221204 is an abundant number, since it is smaller than the sum of its proper divisors (231648556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151221204 is a wasteful number, since it uses less digits than its factorization.

151221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780 (or 6775 counting only the distinct ones).

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

The square root of 151221204 is about 12297.2030966395. The cubic root of 151221204 is about 532.7673034747.

Adding to 151221204 its reverse (402122151), we get a palindrome (553343355).

The spelling of 151221204 in words is "one hundred fifty-one million, two hundred twenty-one thousand, two hundred four".