620522157 has 4 divisors (see below), whose sum is σ = 827362880. Its totient is φ = 413681436.

The previous prime is 620522143. The next prime is 620522209. The reversal of 620522157 is 751225026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 620522157 - 2⁷ = 620522029 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 (620562157) 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, 103420357 + ... + 103420362.

It is an arithmetic number, because the mean of its divisors is an integer number (206840720).

Almost surely, 2^620522157 is an apocalyptic number.

It is an amenable number.

620522157 is a deficient number, since it is larger than the sum of its proper divisors (206840723).

620522157 is a wasteful number, since it uses less digits than its factorization.

620522157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206840722.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 620522157 is about 24910.2821541628. The cubic root of 620522157 is about 852.9412097961.

The spelling of 620522157 in words is "six hundred twenty million, five hundred twenty-two thousand, one hundred fifty-seven".