55722251 has 8 divisors (see below), whose sum is σ = 60251184. Its totient is φ = 51228000.

The previous prime is 55722241. The next prime is 55722263. The reversal of 55722251 is 15222755.

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 55722251 - 2⁶ = 55722187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55722241) 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, 5276 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (7531398).

Almost surely, 2^55722251 is an apocalyptic number.

55722251 is a deficient number, since it is larger than the sum of its proper divisors (4528933).

55722251 is a wasteful number, since it uses less digits than its factorization.

55722251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17341.

The product of its digits is 7000, while the sum is 29.

The square root of 55722251 is about 7464.7338197688. The cubic root of 55722251 is about 381.9526704151.

The spelling of 55722251 in words is "fifty-five million, seven hundred twenty-two thousand, two hundred fifty-one".