651315023 has 4 divisors (see below), whose sum is σ = 666461928. Its totient is φ = 636168120.

The previous prime is 651315019. The next prime is 651315043. The reversal of 651315023 is 320513156.

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

It is a cyclic number.

It is not a de Polignac number, because 651315023 - 2² = 651315019 is a prime.

It is a super-2 number, since 2×651315023² = 848422518370981058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 651314983 and 651315001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651315013) 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, 7573388 + ... + 7573473.

It is an arithmetic number, because the mean of its divisors is an integer number (166615482).

Almost surely, 2^651315023 is an apocalyptic number.

651315023 is a deficient number, since it is larger than the sum of its proper divisors (15146905).

651315023 is a wasteful number, since it uses less digits than its factorization.

651315023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15146904.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 651315023 is about 25520.8742601032. The cubic root of 651315023 is about 866.8228781702.

Adding to 651315023 its reverse (320513156), we get a palindrome (971828179).

The spelling of 651315023 in words is "six hundred fifty-one million, three hundred fifteen thousand, twenty-three".