151304021 has 4 divisors (see below), whose sum is σ = 165058944. Its totient is φ = 137549100.

The previous prime is 151304003. The next prime is 151304071. The reversal of 151304021 is 120403151.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120403151 = 11 ⋅10945741.

It is a cyclic number.

It is not a de Polignac number, because 151304021 - 2¹⁴ = 151287637 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 (151304071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6877445 + ... + 6877466.

It is an arithmetic number, because the mean of its divisors is an integer number (41264736).

Almost surely, 2^151304021 is an apocalyptic number.

151304021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

151304021 is a deficient number, since it is larger than the sum of its proper divisors (13754923).

151304021 is a wasteful number, since it uses less digits than its factorization.

151304021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13754922.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 151304021 is about 12300.5699461448. The cubic root of 151304021 is about 532.8645432279.

Adding to 151304021 its reverse (120403151), we get a palindrome (271707172).

The spelling of 151304021 in words is "one hundred fifty-one million, three hundred four thousand, twenty-one".