55780622 has 4 divisors (see below), whose sum is σ = 83670936. Its totient is φ = 27890310.

The previous prime is 55780619. The next prime is 55780631. The reversal of 55780622 is 22608755.

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

It is a super-2 number, since 2×55780622² = 6222955581413768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13945154 + ... + 13945157.

It is an arithmetic number, because the mean of its divisors is an integer number (20917734).

Almost surely, 2^55780622 is an apocalyptic number.

55780622 is a deficient number, since it is larger than the sum of its proper divisors (27890314).

55780622 is a wasteful number, since it uses less digits than its factorization.

55780622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27890313.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 55780622 is about 7468.6425808175. The cubic root of 55780622 is about 382.0859934506.

The spelling of 55780622 in words is "fifty-five million, seven hundred eighty thousand, six hundred twenty-two".