151601621 has 8 divisors (see below), whose sum is σ = 155908800. Its totient is φ = 147352480.

The previous prime is 151601603. The next prime is 151601623. The reversal of 151601621 is 126106151.

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

It is a cyclic number.

It is not a de Polignac number, because 151601621 - 2¹⁸ = 151339477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151601623) 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 7 ways as a sum of consecutive naturals, for example, 9185 + ... + 19686.

It is an arithmetic number, because the mean of its divisors is an integer number (19488600).

Almost surely, 2^151601621 is an apocalyptic number.

It is an amenable number.

151601621 is a deficient number, since it is larger than the sum of its proper divisors (4307179).

151601621 is an equidigital number, since it uses as much as digits as its factorization.

151601621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29019.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 151601621 is about 12312.6610040235. The cubic root of 151601621 is about 533.2136783220.

Adding to 151601621 its reverse (126106151), we get a palindrome (277707772).

The spelling of 151601621 in words is "one hundred fifty-one million, six hundred one thousand, six hundred twenty-one".