243277148201 has 2 divisors, whose sum is σ = 243277148202. Its totient is φ = 243277148200.

The previous prime is 243277148131. The next prime is 243277148207. The reversal of 243277148201 is 102841772342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134920309225 + 108356838976 = 367315^2 + 329176^2 .

It is a cyclic number.

It is not a de Polignac number, because 243277148201 - 2¹⁰ = 243277147177 is a prime.

It is a super-2 number, since 2×243277148201² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243277148207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121638574100 + 121638574101.

It is an arithmetic number, because the mean of its divisors is an integer number (121638574101).

Almost surely, 2^243277148201 is an apocalyptic number.

It is an amenable number.

243277148201 is a deficient number, since it is larger than the sum of its proper divisors (1).

243277148201 is an equidigital number, since it uses as much as digits as its factorization.

243277148201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 243277148201 in words is "two hundred forty-three billion, two hundred seventy-seven million, one hundred forty-eight thousand, two hundred one".