651155493 has 8 divisors (see below), whose sum is σ = 888398368. Its totient is φ = 424008144.

The previous prime is 651155467. The next prime is 651155521. The reversal of 651155493 is 394551156.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 651155493 - 2⁹ = 651154981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651155423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2523730 + ... + 2523987.

It is an arithmetic number, because the mean of its divisors is an integer number (111049796).

Almost surely, 2^651155493 is an apocalyptic number.

It is an amenable number.

651155493 is a deficient number, since it is larger than the sum of its proper divisors (237242875).

651155493 is a wasteful number, since it uses less digits than its factorization.

651155493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047763.

The product of its digits is 81000, while the sum is 39.

The square root of 651155493 is about 25517.7485879926. The cubic root of 651155493 is about 866.7521005687.

The spelling of 651155493 in words is "six hundred fifty-one million, one hundred fifty-five thousand, four hundred ninety-three".