151891521 has 8 divisors (see below), whose sum is σ = 202621440. Its totient is φ = 101211312.

The previous prime is 151891513. The next prime is 151891541. The reversal of 151891521 is 125198151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 151891521 - 2³ = 151891513 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (151891541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4590 + ... + 18023.

It is an arithmetic number, because the mean of its divisors is an integer number (25327680).

Almost surely, 2^151891521 is an apocalyptic number.

It is an amenable number.

151891521 is a deficient number, since it is larger than the sum of its proper divisors (50729919).

151891521 is a wasteful number, since it uses less digits than its factorization.

151891521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24855.

The product of its digits is 3600, while the sum is 33.

The square root of 151891521 is about 12324.4278163329. The cubic root of 151891521 is about 533.5533409587.

It can be divided in two parts, 1518 and 91521, that added together give a palindrome (93039).

The spelling of 151891521 in words is "one hundred fifty-one million, eight hundred ninety-one thousand, five hundred twenty-one".