1551100401 has 16 divisors (see below), whose sum is σ = 2300222400. Its totient is φ = 1033033824.

The previous prime is 1551100367. The next prime is 1551100477. The reversal of 1551100401 is 1040011551.

It is a happy number.

1551100401 is a `hidden beast` number, since 155 + 110 + 0 + 401 = 666.

It is not a de Polignac number, because 1551100401 - 2²⁵ = 1517545969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551105401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676 + ... + 55701.

It is an arithmetic number, because the mean of its divisors is an integer number (143763900).

Almost surely, 2^1551100401 is an apocalyptic number.

It is an amenable number.

1551100401 is a deficient number, since it is larger than the sum of its proper divisors (749121999).

1551100401 is a wasteful number, since it uses less digits than its factorization.

1551100401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57405 (or 57399 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1551100401 is about 39384.0119972559. The cubic root of 1551100401 is about 1157.5683308777.

Adding to 1551100401 its reverse (1040011551), we get a palindrome (2591111952).

The spelling of 1551100401 in words is "one billion, five hundred fifty-one million, one hundred thousand, four hundred one".