55121522 has 8 divisors (see below), whose sum is σ = 82977372. Its totient is φ = 27462400.

The previous prime is 55121519. The next prime is 55121533. The reversal of 55121522 is 22512155.

It can be written as a sum of positive squares in 2 ways, for example, as 52722121 + 2399401 = 7261^2 + 1549^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48479 + ... + 49602.

Almost surely, 2^55121522 is an apocalyptic number.

55121522 is a deficient number, since it is larger than the sum of its proper divisors (27855850).

55121522 is a wasteful number, since it uses less digits than its factorization.

55121522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98364.

The product of its digits is 1000, while the sum is 23.

The square root of 55121522 is about 7424.3869780609. The cubic root of 55121522 is about 380.5751263426.

Adding to 55121522 its reverse (22512155), we get a palindrome (77633677).

The spelling of 55121522 in words is "fifty-five million, one hundred twenty-one thousand, five hundred twenty-two".