151221016 has 16 divisors (see below), whose sum is σ = 283681440. Its totient is φ = 75572640.

The previous prime is 151220977. The next prime is 151221017. The reversal of 151221016 is 610122151.

It is a junction number, because it is equal to n+sod(n) for n = 151220984 and 151221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19585 + ... + 26191.

It is an arithmetic number, because the mean of its divisors is an integer number (17730090).

Almost surely, 2^151221016 is an apocalyptic number.

It is an amenable number.

151221016 is a deficient number, since it is larger than the sum of its proper divisors (132460424).

151221016 is a wasteful number, since it uses less digits than its factorization.

151221016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474 (or 9470 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 151221016 is about 12297.1954526225. The cubic root of 151221016 is about 532.7670826937.

Adding to 151221016 its reverse (610122151), we get a palindrome (761343167).

The spelling of 151221016 in words is "one hundred fifty-one million, two hundred twenty-one thousand, sixteen".