1631445541 has 12 divisors (see below), whose sum is σ = 1797295500. Its totient is φ = 1479779840.

The previous prime is 1631445527. The next prime is 1631445577. The reversal of 1631445541 is 1455441361.

It can be written as a sum of positive squares in 2 ways, for example, as 1390544100 + 240901441 = 37290^2 + 15521^2 .

It is not a de Polignac number, because 1631445541 - 2¹⁷ = 1631314469 is a prime.

It is a super-2 number, since 2×1631445541² = 5323229106497565362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1631445497 and 1631445506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631442541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39315 + ... + 69343.

It is an arithmetic number, because the mean of its divisors is an integer number (149774625).

Almost surely, 2^1631445541 is an apocalyptic number.

1631445541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1631445541 is a deficient number, since it is larger than the sum of its proper divisors (165849959).

1631445541 is a wasteful number, since it uses less digits than its factorization.

1631445541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30500 (or 30489 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 1631445541 is about 40391.1567177767. The cubic root of 1631445541 is about 1177.2197161660.

The spelling of 1631445541 in words is "one billion, six hundred thirty-one million, four hundred forty-five thousand, five hundred forty-one".