45477531 has 40 divisors (see below), whose sum is σ = 75898944. Its totient is φ = 26898480.

The previous prime is 45477503. The next prime is 45477547. The reversal of 45477531 is 13577454.

It is a happy number.

45477531 is a `hidden beast` number, since 4 + 54 + 77 + 531 = 666.

It is not a de Polignac number, because 45477531 - 2¹⁰ = 45476507 is a prime.

It is a super-2 number, since 2×45477531² = 4136411651711922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45477571) 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 39 ways as a sum of consecutive naturals, for example, 37720 + ... + 38906.

Almost surely, 2^45477531 is an apocalyptic number.

45477531 is a deficient number, since it is larger than the sum of its proper divisors (30421413).

45477531 is a wasteful number, since it uses less digits than its factorization.

45477531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1244 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 45477531 is about 6743.7030628580. The cubic root of 45477531 is about 356.9430740389.

The spelling of 45477531 in words is "forty-five million, four hundred seventy-seven thousand, five hundred thirty-one".