75228545 has 16 divisors (see below), whose sum is σ = 103369728. Its totient is φ = 51485760.

The previous prime is 75228541. The next prime is 75228557. The reversal of 75228545 is 54582257.

It is not a de Polignac number, because 75228545 - 2² = 75228541 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 75228499 and 75228508.

It is not an unprimeable number, because it can be changed into a prime (75228541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19475 + ... + 23015.

It is an arithmetic number, because the mean of its divisors is an integer number (6460608).

Almost surely, 2^75228545 is an apocalyptic number.

75228545 is the 7082-nd pentagonal number.

It is an amenable number.

75228545 is a deficient number, since it is larger than the sum of its proper divisors (28141183).

75228545 is a wasteful number, since it uses less digits than its factorization.

75228545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160.

The product of its digits is 112000, while the sum is 38.

The square root of 75228545 is about 8673.4390526480. The cubic root of 75228545 is about 422.1442589840.

The spelling of 75228545 in words is "seventy-five million, two hundred twenty-eight thousand, five hundred forty-five".