722694551 has 8 divisors (see below), whose sum is σ = 734000400. Its totient is φ = 711475072.

The previous prime is 722694541. The next prime is 722694559. The reversal of 722694551 is 155496227.

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

It is a cyclic number.

It is not a de Polignac number, because 722694551 - 2¹⁸ = 722432407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722694499 and 722694508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722694559) 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, 4625 + ... + 38298.

It is an arithmetic number, because the mean of its divisors is an integer number (91750050).

Almost surely, 2^722694551 is an apocalyptic number.

722694551 is a deficient number, since it is larger than the sum of its proper divisors (11305849).

722694551 is a wasteful number, since it uses less digits than its factorization.

722694551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43185.

The product of its digits is 151200, while the sum is 41.

The square root of 722694551 is about 26882.9788341992. The cubic root of 722694551 is about 897.3976475640.

The spelling of 722694551 in words is "seven hundred twenty-two million, six hundred ninety-four thousand, five hundred fifty-one".