36145931 has 4 divisors (see below), whose sum is σ = 36283632. Its totient is φ = 36008232.

The previous prime is 36145909. The next prime is 36145933. The reversal of 36145931 is 13954163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13954163 = 523 ⋅26681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36145931 is a prime.

It is a super-2 number, since 2×36145931² = 2613056655713522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36145933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68456 + ... + 68981.

It is an arithmetic number, because the mean of its divisors is an integer number (9070908).

Almost surely, 2^36145931 is an apocalyptic number.

36145931 is a deficient number, since it is larger than the sum of its proper divisors (137701).

36145931 is a wasteful number, since it uses less digits than its factorization.

36145931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137700.

The product of its digits is 9720, while the sum is 32.

The square root of 36145931 is about 6012.1486175909. The cubic root of 36145931 is about 330.6382840755.

The spelling of 36145931 in words is "thirty-six million, one hundred forty-five thousand, nine hundred thirty-one".