71533730 has 16 divisors (see below), whose sum is σ = 128932344. Its totient is φ = 28575360.

The previous prime is 71533711. The next prime is 71533741. The reversal of 71533730 is 3733517.

It can be written as a sum of positive squares in 4 ways, for example, as 66275881 + 5257849 = 8141^2 + 2293^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71533693 and 71533702.

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, 3854 + ... + 12566.

Almost surely, 2^71533730 is an apocalyptic number.

71533730 is a deficient number, since it is larger than the sum of its proper divisors (57398614).

71533730 is a wasteful number, since it uses less digits than its factorization.

71533730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541.

The product of its (nonzero) digits is 6615, while the sum is 29.

The square root of 71533730 is about 8457.7615241859. The cubic root of 71533730 is about 415.1167813795.

It can be divided in two parts, 71533 and 730, that multiplied together give a triangular number (52219090 = T₁₀₂₁₉).

The spelling of 71533730 in words is "seventy-one million, five hundred thirty-three thousand, seven hundred thirty".