1654441631 has 4 divisors (see below), whose sum is σ = 1656544632. Its totient is φ = 1652338632.

The previous prime is 1654441609. The next prime is 1654441639. The reversal of 1654441631 is 1361444561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1654441631 - 2²⁶ = 1587332767 is a prime.

It is a super-2 number, since 2×1654441631² = 5474354220771880322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1654441591 and 1654441600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1654441639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050320 + ... + 1051893.

It is an arithmetic number, because the mean of its divisors is an integer number (414136158).

Almost surely, 2^1654441631 is an apocalyptic number.

1654441631 is a deficient number, since it is larger than the sum of its proper divisors (2103001).

1654441631 is an equidigital number, since it uses as much as digits as its factorization.

1654441631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103000.

The product of its digits is 34560, while the sum is 35.

The square root of 1654441631 is about 40674.8279775096. The cubic root of 1654441631 is about 1182.7251081975.

The spelling of 1654441631 in words is "one billion, six hundred fifty-four million, four hundred forty-one thousand, six hundred thirty-one".