151883921 has 4 divisors (see below), whose sum is σ = 173581632. Its totient is φ = 130186212.

The previous prime is 151883887. The next prime is 151883923. The reversal of 151883921 is 129388151.

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: 129388151 = 7027 ⋅18413.

It is a cyclic number.

It is not a de Polignac number, because 151883921 - 2⁶ = 151883857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151883923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10848845 + ... + 10848858.

It is an arithmetic number, because the mean of its divisors is an integer number (43395408).

Almost surely, 2^151883921 is an apocalyptic number.

It is an amenable number.

151883921 is a deficient number, since it is larger than the sum of its proper divisors (21697711).

151883921 is an equidigital number, since it uses as much as digits as its factorization.

151883921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21697710.

The product of its digits is 17280, while the sum is 38.

The square root of 151883921 is about 12324.1194817317. The cubic root of 151883921 is about 533.5444419036.

The spelling of 151883921 in words is "one hundred fifty-one million, eight hundred eighty-three thousand, nine hundred twenty-one".