100401551 has 2 divisors, whose sum is σ = 100401552. Its totient is φ = 100401550.

The previous prime is 100401527. The next prime is 100401559. The reversal of 100401551 is 155104001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100401551 - 2⁶ = 100401487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100401559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50200775 + 50200776.

It is an arithmetic number, because the mean of its divisors is an integer number (50200776).

Almost surely, 2^100401551 is an apocalyptic number.

100401551 is a deficient number, since it is larger than the sum of its proper divisors (1).

100401551 is an equidigital number, since it uses as much as digits as its factorization.

100401551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 100401551 is about 10020.0574349651. The cubic root of 100401551 is about 464.7793318411.

Adding to 100401551 its reverse (155104001), we get a palindrome (255505552).

The spelling of 100401551 in words is "one hundred million, four hundred one thousand, five hundred fifty-one".