30240157 has 4 divisors (see below), whose sum is σ = 30810780. Its totient is φ = 29669536.

The previous prime is 30240151. The next prime is 30240163. The reversal of 30240157 is 75104203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75104203 = 5827 ⋅12889.

It is an interprime number because it is at equal distance from previous prime (30240151) and next prime (30240163).

It can be written as a sum of positive squares in 2 ways, for example, as 21631801 + 8608356 = 4651^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 30240157 - 2³ = 30240149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30240151) 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, 285232 + ... + 285337.

It is an arithmetic number, because the mean of its divisors is an integer number (7702695).

Almost surely, 2^30240157 is an apocalyptic number.

It is an amenable number.

30240157 is a deficient number, since it is larger than the sum of its proper divisors (570623).

30240157 is an equidigital number, since it uses as much as digits as its factorization.

30240157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570622.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30240157 is about 5499.1051090155. The cubic root of 30240157 is about 311.5501852778.

The spelling of 30240157 in words is "thirty million, two hundred forty thousand, one hundred fifty-seven".