151075621 has 4 divisors (see below), whose sum is σ = 151568032. Its totient is φ = 150583212.

The previous prime is 151075607. The next prime is 151075633. The reversal of 151075621 is 126570151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151075621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151075621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151075601) 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, 245745 + ... + 246358.

It is an arithmetic number, because the mean of its divisors is an integer number (37892008).

Almost surely, 2^151075621 is an apocalyptic number.

It is an amenable number.

151075621 is a deficient number, since it is larger than the sum of its proper divisors (492411).

151075621 is an equidigital number, since it uses as much as digits as its factorization.

151075621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492410.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 151075621 is about 12291.2823171547. The cubic root of 151075621 is about 532.5962807971.

The spelling of 151075621 in words is "one hundred fifty-one million, seventy-five thousand, six hundred twenty-one".