651530455 has 4 divisors (see below), whose sum is σ = 781836552. Its totient is φ = 521224360.

The previous prime is 651530449. The next prime is 651530479. The reversal of 651530455 is 554035156.

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

It is not a de Polignac number, because 651530455 - 2⁹ = 651529943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651530455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65153041 + ... + 65153050.

It is an arithmetic number, because the mean of its divisors is an integer number (195459138).

Almost surely, 2^651530455 is an apocalyptic number.

651530455 is a deficient number, since it is larger than the sum of its proper divisors (130306097).

651530455 is a wasteful number, since it uses less digits than its factorization.

651530455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130306096.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 651530455 is about 25525.0946129490. The cubic root of 651530455 is about 866.9184390966.

The spelling of 651530455 in words is "six hundred fifty-one million, five hundred thirty thousand, four hundred fifty-five".