520157149 has 4 divisors (see below), whose sum is σ = 521631036. Its totient is φ = 518683264.

The previous prime is 520157123. The next prime is 520157159. The reversal of 520157149 is 941751025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312653124 + 207504025 = 17682^2 + 14405^2 .

It is a cyclic number.

It is not a de Polignac number, because 520157149 - 2¹¹ = 520155101 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 (520157159) 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, 736414 + ... + 737119.

It is an arithmetic number, because the mean of its divisors is an integer number (130407759).

Almost surely, 2^520157149 is an apocalyptic number.

It is an amenable number.

520157149 is a deficient number, since it is larger than the sum of its proper divisors (1473887).

520157149 is a wasteful number, since it uses less digits than its factorization.

520157149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473886.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 520157149 is about 22806.9539614566. The cubic root of 520157149 is about 804.2261503578.

The spelling of 520157149 in words is "five hundred twenty million, one hundred fifty-seven thousand, one hundred forty-nine".