30736157 has 4 divisors (see below), whose sum is σ = 30751836. Its totient is φ = 30720480.

The previous prime is 30736141. The next prime is 30736163. The reversal of 30736157 is 75163703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75163703 = 233 ⋅322591.

It can be written as a sum of positive squares in 2 ways, for example, as 8561476 + 22174681 = 2926^2 + 4709^2 .

It is a cyclic number.

It is not a de Polignac number, because 30736157 - 2⁴ = 30736141 is a prime.

It is a super-2 number, since 2×30736157² = 1889422694257298, 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 (30736457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394 + ... + 8987.

It is an arithmetic number, because the mean of its divisors is an integer number (7687959).

Almost surely, 2^30736157 is an apocalyptic number.

It is an amenable number.

30736157 is a deficient number, since it is larger than the sum of its proper divisors (15679).

30736157 is a wasteful number, since it uses less digits than its factorization.

30736157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15678.

The product of its (nonzero) digits is 13230, while the sum is 32.

The square root of 30736157 is about 5544.0199314216. The cubic root of 30736157 is about 313.2443083687.

The spelling of 30736157 in words is "thirty million, seven hundred thirty-six thousand, one hundred fifty-seven".