75515472 has 30 divisors (see below), whose sum is σ = 211338842. Its totient is φ = 25171776.

The previous prime is 75515471. The next prime is 75515477. The reversal of 75515472 is 27451557.

75515472 is a `hidden beast` number, since 75 + 515 + 4 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64064016 + 11451456 = 8004^2 + 3384^2 .

It is a super-2 number, since 2×75515472² = 11405173022765568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75515471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262063 + ... + 262350.

Almost surely, 2^75515472 is an apocalyptic number.

75515472 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

75515472 is an abundant number, since it is smaller than the sum of its proper divisors (135823370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75515472 is a wasteful number, since it uses less digits than its factorization.

75515472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524427 (or 524418 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 75515472 is about 8689.9638664381. The cubic root of 75515472 is about 422.6802741304.

The spelling of 75515472 in words is "seventy-five million, five hundred fifteen thousand, four hundred seventy-two".