151864021 has 8 divisors (see below), whose sum is σ = 157850784. Its totient is φ = 145976400.

The previous prime is 151864019. The next prime is 151864051. The reversal of 151864021 is 120468151.

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 151864021 - 2¹ = 151864019 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 (151864001) 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, 21655 + ... + 27796.

It is an arithmetic number, because the mean of its divisors is an integer number (19731348).

Almost surely, 2^151864021 is an apocalyptic number.

It is an amenable number.

151864021 is a deficient number, since it is larger than the sum of its proper divisors (5986763).

151864021 is an equidigital number, since it uses as much as digits as its factorization.

151864021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49571.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 151864021 is about 12323.3120953744. The cubic root of 151864021 is about 533.5211390241.

The spelling of 151864021 in words is "one hundred fifty-one million, eight hundred sixty-four thousand, twenty-one".