75215340 has 36 divisors (see below), whose sum is σ = 228153744. Its totient is φ = 20057376.

The previous prime is 75215333. The next prime is 75215363. The reversal of 75215340 is 4351257.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208752 + ... + 209111.

It is an arithmetic number, because the mean of its divisors is an integer number (6337604).

Almost surely, 2^75215340 is an apocalyptic number.

It is an amenable number.

75215340 is an abundant number, since it is smaller than the sum of its proper divisors (152938404).

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

75215340 is a wasteful number, since it uses less digits than its factorization.

75215340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417878 (or 417873 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 75215340 is about 8672.6777871659. The cubic root of 75215340 is about 422.1195576283.

Adding to 75215340 its reverse (4351257), we get a palindrome (79566597).

The spelling of 75215340 in words is "seventy-five million, two hundred fifteen thousand, three hundred forty".