75520030 has 16 divisors (see below), whose sum is σ = 140321664. Its totient is φ = 29233440.

The previous prime is 75520021. The next prime is 75520043. The reversal of 75520030 is 3002557.

It is a junction number, because it is equal to n+sod(n) for n = 75519983 and 75520010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121497 + ... + 122116.

It is an arithmetic number, because the mean of its divisors is an integer number (8770104).

Almost surely, 2^75520030 is an apocalyptic number.

75520030 is a deficient number, since it is larger than the sum of its proper divisors (64801634).

75520030 is a wasteful number, since it uses less digits than its factorization.

75520030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243651.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 75520030 is about 8690.2261190374. The cubic root of 75520030 is about 422.6887780739.

Adding to 75520030 its reverse (3002557), we get a palindrome (78522587).

The spelling of 75520030 in words is "seventy-five million, five hundred twenty thousand, thirty".