1655131 has 2 divisors, whose sum is σ = 1655132. Its totient is φ = 1655130.

The previous prime is 1655123. The next prime is 1655141. The reversal of 1655131 is 1315561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1655131 - 2³ = 1655123 is a prime.

It is a super-2 number, since 2×1655131² = 5478917254322, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1655141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827565 + 827566.

It is an arithmetic number, because the mean of its divisors is an integer number (827566).

2^1655131 is an apocalyptic number.

1655131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655131 is an equidigital number, since it uses as much as digits as its factorization.

1655131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 1655131 is about 1286.5189466152. The cubic root of 1655131 is about 118.2889357128.

The spelling of 1655131 in words is "one million, six hundred fifty-five thousand, one hundred thirty-one".