250370221 has 2 divisors, whose sum is σ = 250370222. Its totient is φ = 250370220.

The previous prime is 250370207. The next prime is 250370243. The reversal of 250370221 is 122073052.

250370221 = T₁₂₉₁₈ + T₁₂₉₁₉ + T₁₂₉₂₀.

It is an a-pointer prime, because the next prime (250370243) can be obtained adding 250370221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225420196 + 24950025 = 15014^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 250370221 - 2⁵ = 250370189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 250370192 and 250370201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250370521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125185110 + 125185111.

It is an arithmetic number, because the mean of its divisors is an integer number (125185111).

Almost surely, 2^250370221 is an apocalyptic number.

250370221 is the 12920-th centered triangular number.

It is an amenable number.

250370221 is a deficient number, since it is larger than the sum of its proper divisors (1).

250370221 is an equidigital number, since it uses as much as digits as its factorization.

250370221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 250370221 is about 15823.0913856933. The cubic root of 250370221 is about 630.2713377260.

The spelling of 250370221 in words is "two hundred fifty million, three hundred seventy thousand, two hundred twenty-one".