4155731 has 2 divisors, whose sum is σ = 4155732. Its totient is φ = 4155730.

The previous prime is 4155721. The next prime is 4155733. The reversal of 4155731 is 1375514.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4155731 is a prime.

It is a super-2 number, since 2×4155731² = 34540200288722, which contains 22 as substring.

Together with 4155733, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₂₉₃₃₉₀ and since 4155731 and 293390 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4155731.

It is not a weakly prime, because it can be changed into another prime (4155733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077865 + 2077866.

It is an arithmetic number, because the mean of its divisors is an integer number (2077866).

Almost surely, 2^4155731 is an apocalyptic number.

4155731 is a deficient number, since it is larger than the sum of its proper divisors (1).

4155731 is an equidigital number, since it uses as much as digits as its factorization.

4155731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 26.

The square root of 4155731 is about 2038.5610120867. The cubic root of 4155731 is about 160.7739971608.

The spelling of 4155731 in words is "four million, one hundred fifty-five thousand, seven hundred thirty-one".