55151001 has 6 divisors (see below), whose sum is σ = 79662570. Its totient is φ = 36767328.

The previous prime is 55150973. The next prime is 55151003. The reversal of 55151001 is 10015155.

It can be written as a sum of positive squares in only one way, i.e., 47941776 + 7209225 = 6924^2 + 2685^2 .

It is not a de Polignac number, because 55151001 - 2⁶ = 55150937 is a prime.

It is a super-2 number, since 2×55151001² = 6083265822604002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55151003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3063936 + ... + 3063953.

It is an arithmetic number, because the mean of its divisors is an integer number (13277095).

Almost surely, 2^55151001 is an apocalyptic number.

It is an amenable number.

55151001 is a deficient number, since it is larger than the sum of its proper divisors (24511569).

55151001 is a wasteful number, since it uses less digits than its factorization.

55151001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127895 (or 6127892 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 55151001 is about 7426.3719944533. The cubic root of 55151001 is about 380.6429581342.

Adding to 55151001 its reverse (10015155), we get a palindrome (65166156).

The spelling of 55151001 in words is "fifty-five million, one hundred fifty-one thousand, one".