512213157 has 24 divisors (see below), whose sum is σ = 753680928. Its totient is φ = 335124000.

The previous prime is 512213137. The next prime is 512213159. The reversal of 512213157 is 751312215.

It is a de Polignac number, because none of the positive numbers 2^k-512213157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 512213157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512213159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352282 + ... + 353732.

It is an arithmetic number, because the mean of its divisors is an integer number (31403372).

Almost surely, 2^512213157 is an apocalyptic number.

It is an amenable number.

512213157 is a deficient number, since it is larger than the sum of its proper divisors (241467771).

512213157 is a wasteful number, since it uses less digits than its factorization.

512213157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161 (or 2158 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 512213157 is about 22632.1266565915. The cubic root of 512213157 is about 800.1110038678. Note that the first 3 decimals are identical.

The spelling of 512213157 in words is "five hundred twelve million, two hundred thirteen thousand, one hundred fifty-seven".