213928501 has 2 divisors, whose sum is σ = 213928502. Its totient is φ = 213928500.

The previous prime is 213928439. The next prime is 213928541. The reversal of 213928501 is 105829312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196280100 + 17648401 = 14010^2 + 4201^2 .

It is a cyclic number.

It is not a de Polignac number, because 213928501 - 2⁷ = 213928373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213928541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106964250 + 106964251.

It is an arithmetic number, because the mean of its divisors is an integer number (106964251).

Almost surely, 2^213928501 is an apocalyptic number.

It is an amenable number.

213928501 is a deficient number, since it is larger than the sum of its proper divisors (1).

213928501 is an equidigital number, since it uses as much as digits as its factorization.

213928501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 213928501 is about 14626.2948486621. The cubic root of 213928501 is about 598.0757809356.

The spelling of 213928501 in words is "two hundred thirteen million, nine hundred twenty-eight thousand, five hundred one".