65211172 has 12 divisors (see below), whose sum is σ = 122898076. Its totient is φ = 30097440.

The previous prime is 65211151. The next prime is 65211193. The reversal of 65211172 is 27111256.

It is an interprime number because it is at equal distance from previous prime (65211151) and next prime (65211193).

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 48776256 = 4054^2 + 6984^2 .

It is a super-2 number, since 2×65211172² = 8504993907227168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626979 + ... + 627082.

Almost surely, 2^65211172 is an apocalyptic number.

It is an amenable number.

65211172 is a deficient number, since it is larger than the sum of its proper divisors (57686904).

65211172 is a wasteful number, since it uses less digits than its factorization.

65211172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254078 (or 1254076 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 65211172 is about 8075.3434601879. The cubic root of 65211172 is about 402.5075229745.

It can be divided in two parts, 65 and 211172, that multiplied together give a triangular number (13726180 = T₅₂₃₉).

The spelling of 65211172 in words is "sixty-five million, two hundred eleven thousand, one hundred seventy-two".