231736149 has 6 divisors (see below), whose sum is σ = 334730006. Its totient is φ = 154490760.

The previous prime is 231736121. The next prime is 231736157. The reversal of 231736149 is 941637132.

231736149 is a `hidden beast` number, since 2 + 31 + 7 + 3 + 614 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 227708100 + 4028049 = 15090^2 + 2007^2 .

It is not a de Polignac number, because 231736149 - 2¹¹ = 231734101 is a prime.

It is a super-3 number, since 3×231736149³ (a number of 26 digits) contains 333 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 (231736189) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12874222 + ... + 12874239.

Almost surely, 2^231736149 is an apocalyptic number.

It is an amenable number.

231736149 is a deficient number, since it is larger than the sum of its proper divisors (102993857).

231736149 is a wasteful number, since it uses less digits than its factorization.

231736149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748467 (or 25748464 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 231736149 is about 15222.8824143130. The cubic root of 231736149 is about 614.2303360080.

The spelling of 231736149 in words is "two hundred thirty-one million, seven hundred thirty-six thousand, one hundred forty-nine".