148881821 has 16 divisors (see below), whose sum is σ = 169124928. Its totient is φ = 129859200.

The previous prime is 148881791. The next prime is 148881827. The reversal of 148881821 is 128188841.

It is a cyclic number.

It is not a de Polignac number, because 148881821 - 2⁶ = 148881757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148881827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27206 + ... + 32216.

It is an arithmetic number, because the mean of its divisors is an integer number (10570308).

Almost surely, 2^148881821 is an apocalyptic number.

148881821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

148881821 is a deficient number, since it is larger than the sum of its proper divisors (20243107).

148881821 is a wasteful number, since it uses less digits than its factorization.

148881821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132.

The product of its digits is 32768, while the sum is 41.

The square root of 148881821 is about 12201.7138550287. The cubic root of 148881821 is about 530.0057208354.

The spelling of 148881821 in words is "one hundred forty-eight million, eight hundred eighty-one thousand, eight hundred twenty-one".