30477157 has 4 divisors (see below), whose sum is σ = 30699756. Its totient is φ = 30254560.

The previous prime is 30477151. The next prime is 30477169. The reversal of 30477157 is 75177403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75177403 = 7 ⋅10739629.

It can be written as a sum of positive squares in 2 ways, for example, as 24591681 + 5885476 = 4959^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 30477157 - 2³ = 30477149 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 (30477151) 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, 111094 + ... + 111367.

It is an arithmetic number, because the mean of its divisors is an integer number (7674939).

Almost surely, 2^30477157 is an apocalyptic number.

It is an amenable number.

30477157 is a deficient number, since it is larger than the sum of its proper divisors (222599).

30477157 is a wasteful number, since it uses less digits than its factorization.

30477157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222598.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 30477157 is about 5520.6120131739. The cubic root of 30477157 is about 312.3619682668.

The spelling of 30477157 in words is "thirty million, four hundred seventy-seven thousand, one hundred fifty-seven".