651423529 has 3 divisors (see below), whose sum is σ = 651449053. Its totient is φ = 651398006.

The previous prime is 651423523. The next prime is 651423541. The reversal of 651423529 is 925324156.

The square root of 651423529 is 25523.

It is a perfect power (a square), and thus also a powerful number.

651423529 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 651423529 - 2²³ = 643034921 is a prime.

It is a super-2 number, since 2×651423529² = 848705228269627682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651423523) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12762 + ... + 38284.

Almost surely, 2^651423529 is an apocalyptic number.

651423529 is the 25523-rd square number.

651423529 is the 12762-nd centered octagonal number.

It is an amenable number.

651423529 is a deficient number, since it is larger than the sum of its proper divisors (25524).

651423529 is an frugal number, since it uses more digits than its factorization.

651423529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51046 (or 25523 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The cubic root of 651423529 is about 866.8710116936.

The spelling of 651423529 in words is "six hundred fifty-one million, four hundred twenty-three thousand, five hundred twenty-nine".