72505214 has 4 divisors (see below), whose sum is σ = 108757824. Its totient is φ = 36252606.

The previous prime is 72505183. The next prime is 72505229. The reversal of 72505214 is 41250527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41250527 = 503 ⋅82009.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18126302 + ... + 18126305.

It is an arithmetic number, because the mean of its divisors is an integer number (27189456).

Almost surely, 2^72505214 is an apocalyptic number.

72505214 is a deficient number, since it is larger than the sum of its proper divisors (36252610).

72505214 is a wasteful number, since it uses less digits than its factorization.

72505214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36252609.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 72505214 is about 8514.9993540810. Note that the first 3 decimals coincide. The cubic root of 72505214 is about 416.9875414888.

The spelling of 72505214 in words is "seventy-two million, five hundred five thousand, two hundred fourteen".