74505431 has 48 divisors (see below), whose sum is σ = 105412608. Its totient is φ = 51861600.

The previous prime is 74505427. The next prime is 74505443. The reversal of 74505431 is 13450547.

It is not a de Polignac number, because 74505431 - 2² = 74505427 is a prime.

It is a super-2 number, since 2×74505431² = 11102118496991522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74505394 and 74505403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74505421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2403386 + ... + 2403416.

It is an arithmetic number, because the mean of its divisors is an integer number (2196096).

Almost surely, 2^74505431 is an apocalyptic number.

74505431 is a deficient number, since it is larger than the sum of its proper divisors (30907177).

74505431 is an equidigital number, since it uses as much as digits as its factorization.

74505431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 74505431 is about 8631.6528544654. The cubic root of 74505431 is about 420.7873194884.

Adding to 74505431 its reverse (13450547), we get a palindrome (87955978).

It can be divided in two parts, 74 and 505431, that added together give a palindrome (505505).

The spelling of 74505431 in words is "seventy-four million, five hundred five thousand, four hundred thirty-one".