48178021 has 2 divisors, whose sum is σ = 48178022. Its totient is φ = 48178020.

The previous prime is 48178003. The next prime is 48178049. The reversal of 48178021 is 12087184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 5013121 = 6570^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 48178021 - 2⁵ = 48177989 is a prime.

It is a super-2 number, since 2×48178021² = 4642243414952882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48178121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24089010 + 24089011.

It is an arithmetic number, because the mean of its divisors is an integer number (24089011).

Almost surely, 2^48178021 is an apocalyptic number.

It is an amenable number.

48178021 is a deficient number, since it is larger than the sum of its proper divisors (1).

48178021 is an equidigital number, since it uses as much as digits as its factorization.

48178021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 48178021 is about 6941.0388991850. The cubic root of 48178021 is about 363.8728498660.

The spelling of 48178021 in words is "forty-eight million, one hundred seventy-eight thousand, twenty-one".