1631145475 has 12 divisors (see below), whose sum is σ = 2026503976. Its totient is φ = 1302410880.

The previous prime is 1631145473. The next prime is 1631145479. The reversal of 1631145475 is 5745411361.

It is not a de Polignac number, because 1631145475 - 2¹ = 1631145473 is a prime.

It is a super-2 number, since 2×1631145475² = 5321271121225951250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631145473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49302 + ... + 75451.

Almost surely, 2^1631145475 is an apocalyptic number.

1631145475 is a deficient number, since it is larger than the sum of its proper divisors (395358501).

1631145475 is a wasteful number, since it uses less digits than its factorization.

1631145475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125286 (or 125281 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 1631145475 is about 40387.4420457647. The cubic root of 1631145475 is about 1177.1475377897.

The spelling of 1631145475 in words is "one billion, six hundred thirty-one million, one hundred forty-five thousand, four hundred seventy-five".