651203240 has 16 divisors (see below), whose sum is σ = 1465207380. Its totient is φ = 260481280.

The previous prime is 651203233. The next prime is 651203249. The reversal of 651203240 is 42302156.

It can be written as a sum of positive squares in 2 ways, for example, as 619910404 + 31292836 = 24898^2 + 5594^2 .

It is not an unprimeable number, because it can be changed into a prime (651203249) 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, 8140001 + ... + 8140080.

Almost surely, 2^651203240 is an apocalyptic number.

It is an amenable number.

651203240 is an abundant number, since it is smaller than the sum of its proper divisors (814004140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651203240 is a wasteful number, since it uses less digits than its factorization.

651203240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16280092 (or 16280088 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 651203240 is about 25518.6841353546. The cubic root of 651203240 is about 866.7732853709.

Adding to 651203240 its reverse (42302156), we get a palindrome (693505396).

The spelling of 651203240 in words is "six hundred fifty-one million, two hundred three thousand, two hundred forty".