55151651 has 4 divisors (see below), whose sum is σ = 55175400. Its totient is φ = 55127904.

The previous prime is 55151647. The next prime is 55151669. The reversal of 55151651 is 15615155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55151651 - 2² = 55151647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55151951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7961 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (13793850).

Almost surely, 2^55151651 is an apocalyptic number.

55151651 is a deficient number, since it is larger than the sum of its proper divisors (23749).

55151651 is a wasteful number, since it uses less digits than its factorization.

55151651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23748.

The product of its digits is 3750, while the sum is 29.

The square root of 55151651 is about 7426.4157572816. The cubic root of 55151651 is about 380.6444535253.

The spelling of 55151651 in words is "fifty-five million, one hundred fifty-one thousand, six hundred fifty-one".