651240473 has 4 divisors (see below), whose sum is σ = 701335908. Its totient is φ = 601145040.

The previous prime is 651240451. The next prime is 651240487. The reversal of 651240473 is 374042156.

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 330221584 + 321018889 = 18172^2 + 17917^2 .

It is a cyclic number.

It is not a de Polignac number, because 651240473 - 2¹⁴ = 651224089 is a prime.

It is a super-2 number, since 2×651240473² = 848228307346527458, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (651240173) 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, 25047698 + ... + 25047723.

It is an arithmetic number, because the mean of its divisors is an integer number (175333977).

Almost surely, 2^651240473 is an apocalyptic number.

It is an amenable number.

651240473 is a deficient number, since it is larger than the sum of its proper divisors (50095435).

651240473 is a wasteful number, since it uses less digits than its factorization.

651240473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50095434.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 651240473 is about 25519.4136492201. The cubic root of 651240473 is about 866.7898045120.

The spelling of 651240473 in words is "six hundred fifty-one million, two hundred forty thousand, four hundred seventy-three".