2157277 has 2 divisors, whose sum is σ = 2157278. Its totient is φ = 2157276.

The previous prime is 2157269. The next prime is 2157293. The reversal of 2157277 is 7727512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1104601 + 1052676 = 1051^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157277 - 2³ = 2157269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078638 + 1078639.

It is an arithmetic number, because the mean of its divisors is an integer number (1078639).

2^2157277 is an apocalyptic number.

It is an amenable number.

2157277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157277 is an equidigital number, since it uses as much as digits as its factorization.

2157277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6860, while the sum is 31.

The square root of 2157277 is about 1468.7671701124. The cubic root of 2157277 is about 129.2117388779.

The spelling of 2157277 in words is "two million, one hundred fifty-seven thousand, two hundred seventy-seven".