620515213 has 4 divisors (see below), whose sum is σ = 631032480. Its totient is φ = 609997948.

The previous prime is 620515201. The next prime is 620515223. The reversal of 620515213 is 312515026.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620515213 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 (620515223) 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, 5258545 + ... + 5258662.

It is an arithmetic number, because the mean of its divisors is an integer number (157758120).

Almost surely, 2^620515213 is an apocalyptic number.

It is an amenable number.

620515213 is a deficient number, since it is larger than the sum of its proper divisors (10517267).

620515213 is a wasteful number, since it uses less digits than its factorization.

620515213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517266.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 620515213 is about 24910.1427735772. The cubic root of 620515213 is about 852.9380281499.

The spelling of 620515213 in words is "six hundred twenty million, five hundred fifteen thousand, two hundred thirteen".