651613313 has 4 divisors (see below), whose sum is σ = 701737428. Its totient is φ = 601489200.

The previous prime is 651613309. The next prime is 651613321. The reversal of 651613313 is 313316156.

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 32001649 + 619611664 = 5657^2 + 24892^2 .

It is not a de Polignac number, because 651613313 - 2² = 651613309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651613393) 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, 25062038 + ... + 25062063.

It is an arithmetic number, because the mean of its divisors is an integer number (175434357).

Almost surely, 2^651613313 is an apocalyptic number.

It is an amenable number.

651613313 is a deficient number, since it is larger than the sum of its proper divisors (50124115).

651613313 is a wasteful number, since it uses less digits than its factorization.

651613313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50124114.

The product of its digits is 4860, while the sum is 29.

The square root of 651613313 is about 25526.7176307492. The cubic root of 651613313 is about 866.9551874853.

Adding to 651613313 its reverse (313316156), we get a palindrome (964929469).

The spelling of 651613313 in words is "six hundred fifty-one million, six hundred thirteen thousand, three hundred thirteen".