213577923277 has 2 divisors, whose sum is σ = 213577923278. Its totient is φ = 213577923276.

The previous prime is 213577923263. The next prime is 213577923287. The reversal of 213577923277 is 772329775312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206307632521 + 7270290756 = 454211^2 + 85266^2 .

It is a cyclic number.

It is not a de Polignac number, because 213577923277 - 2¹⁵ = 213577890509 is a prime.

It is a super-2 number, since 2×213577923277² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213577923257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106788961638 + 106788961639.

It is an arithmetic number, because the mean of its divisors is an integer number (106788961639).

Almost surely, 2^213577923277 is an apocalyptic number.

It is an amenable number.

213577923277 is a deficient number, since it is larger than the sum of its proper divisors (1).

213577923277 is an equidigital number, since it uses as much as digits as its factorization.

213577923277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7779240, while the sum is 55.

The spelling of 213577923277 in words is "two hundred thirteen billion, five hundred seventy-seven million, nine hundred twenty-three thousand, two hundred seventy-seven".