55772230 has 8 divisors (see below), whose sum is σ = 100390032. Its totient is φ = 22308888.

The previous prime is 55772203. The next prime is 55772237. The reversal of 55772230 is 3227755.

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

It is a super-2 number, since 2×55772230² = 6221083278345800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55772192 and 55772201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55772237) 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, 2788602 + ... + 2788621.

It is an arithmetic number, because the mean of its divisors is an integer number (12548754).

Almost surely, 2^55772230 is an apocalyptic number.

55772230 is a deficient number, since it is larger than the sum of its proper divisors (44617802).

55772230 is a wasteful number, since it uses less digits than its factorization.

55772230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577230.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 55772230 is about 7468.0807440734. The cubic root of 55772230 is about 382.0668313213.

Adding to 55772230 its reverse (3227755), we get a palindrome (58999985).

The spelling of 55772230 in words is "fifty-five million, seven hundred seventy-two thousand, two hundred thirty".