65150981 has 16 divisors (see below), whose sum is σ = 78643200. Its totient is φ = 52725168.

The previous prime is 65150957. The next prime is 65150983. The reversal of 65150981 is 18905156.

It is a cyclic number.

It is not a de Polignac number, because 65150981 - 2²² = 60956677 is a prime.

It is a super-2 number, since 2×65150981² = 8489300650524722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65150983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50300 + ... + 51578.

It is an arithmetic number, because the mean of its divisors is an integer number (4915200).

Almost surely, 2^65150981 is an apocalyptic number.

It is an amenable number.

65150981 is a deficient number, since it is larger than the sum of its proper divisors (13492219).

65150981 is a wasteful number, since it uses less digits than its factorization.

65150981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 65150981 is about 8071.6157614198. The cubic root of 65150981 is about 402.3836444658.

The spelling of 65150981 in words is "sixty-five million, one hundred fifty thousand, nine hundred eighty-one".