151521216 has 224 divisors, whose sum is σ = 515185152. Its totient is φ = 38154240.

The previous prime is 151521203. The next prime is 151521233. The reversal of 151521216 is 612125151.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 546870 + ... + 547146.

Almost surely, 2^151521216 is an apocalyptic number.

151521216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151521216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257592576).

151521216 is an abundant number, since it is smaller than the sum of its proper divisors (363663936).

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

151521216 is a wasteful number, since it uses less digits than its factorization.

151521216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 337 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The square root of 151521216 is about 12309.3954360074. The cubic root of 151521216 is about 533.1193947488.

Adding to 151521216 its reverse (612125151), we get a palindrome (763646367).

The spelling of 151521216 in words is "one hundred fifty-one million, five hundred twenty-one thousand, two hundred sixteen".