68922551 has 4 divisors (see below), whose sum is σ = 68994504. Its totient is φ = 68850600.

The previous prime is 68922533. The next prime is 68922563. The reversal of 68922551 is 15522986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15522986 = 2 ⋅7761493.

It is a cyclic number.

It is not a de Polignac number, because 68922551 - 2¹⁸ = 68660407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68922571) 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, 34520 + ... + 36461.

It is an arithmetic number, because the mean of its divisors is an integer number (17248626).

Almost surely, 2^68922551 is an apocalyptic number.

68922551 is a deficient number, since it is larger than the sum of its proper divisors (71953).

68922551 is an equidigital number, since it uses as much as digits as its factorization.

68922551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71952.

The product of its digits is 43200, while the sum is 38.

The square root of 68922551 is about 8301.9606720340. The cubic root of 68922551 is about 410.0030755272.

The spelling of 68922551 in words is "sixty-eight million, nine hundred twenty-two thousand, five hundred fifty-one".