651590402 has 4 divisors (see below), whose sum is σ = 977385606. Its totient is φ = 325795200.

The previous prime is 651590393. The next prime is 651590411. The reversal of 651590402 is 204095156.

It is a happy number.

651590402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (651590393) and next prime (651590411).

It can be written as a sum of positive squares in only one way, i.e., 466603201 + 184987201 = 21601^2 + 13601^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162897599 + ... + 162897602.

Almost surely, 2^651590402 is an apocalyptic number.

651590402 is a deficient number, since it is larger than the sum of its proper divisors (325795204).

651590402 is a wasteful number, since it uses less digits than its factorization.

651590402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325795203.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 651590402 is about 25526.2688617040. The cubic root of 651590402 is about 866.9450265290.

The spelling of 651590402 in words is "six hundred fifty-one million, five hundred ninety thousand, four hundred two".