1400206551 has 8 divisors (see below), whose sum is σ = 1867396080. Its totient is φ = 933244032.

The previous prime is 1400206529. The next prime is 1400206553. The reversal of 1400206551 is 1556020041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1400206551 - 2⁶ = 1400206487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400206553) 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 7 ways as a sum of consecutive naturals, for example, 41796 + ... + 67433.

It is an arithmetic number, because the mean of its divisors is an integer number (233424510).

Almost surely, 2^1400206551 is an apocalyptic number.

1400206551 is a deficient number, since it is larger than the sum of its proper divisors (467189529).

1400206551 is a wasteful number, since it uses less digits than its factorization.

1400206551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113505.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1400206551 is about 37419.3339197800. Note that the first 3 decimals coincide. The cubic root of 1400206551 is about 1118.7439551664.

Adding to 1400206551 its reverse (1556020041), we get a palindrome (2956226592).

The spelling of 1400206551 in words is "one billion, four hundred million, two hundred six thousand, five hundred fifty-one".