55151020 has 24 divisors (see below), whose sum is σ = 116734464. Its totient is φ = 21885696.

The previous prime is 55151003. The next prime is 55151021. The reversal of 55151020 is 2015155.

It is not an unprimeable number, because it can be changed into a prime (55151021) 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, 8317 + ... + 13396.

It is an arithmetic number, because the mean of its divisors is an integer number (4863936).

Almost surely, 2^55151020 is an apocalyptic number.

It is an amenable number.

55151020 is an abundant number, since it is smaller than the sum of its proper divisors (61583444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55151020 is a wasteful number, since it uses less digits than its factorization.

55151020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21849 (or 21847 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 55151020 is about 7426.3732736781. The cubic root of 55151020 is about 380.6430018458.

Adding to 55151020 its reverse (2015155), we get a palindrome (57166175).

The spelling of 55151020 in words is "fifty-five million, one hundred fifty-one thousand, twenty".