1401500551 has 4 divisors (see below), whose sum is σ = 1528909704. Its totient is φ = 1274091400.

The previous prime is 1401500521. The next prime is 1401500609. The reversal of 1401500551 is 1550051041.

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 1401500551 - 2⁹ = 1401500039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401500521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63704560 + ... + 63704581.

It is an arithmetic number, because the mean of its divisors is an integer number (382227426).

Almost surely, 2^1401500551 is an apocalyptic number.

1401500551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1401500551 is a deficient number, since it is larger than the sum of its proper divisors (127409153).

1401500551 is a wasteful number, since it uses less digits than its factorization.

1401500551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127409152.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1401500551 is about 37436.6204537749. The cubic root of 1401500551 is about 1119.0884778980.

Adding to 1401500551 its reverse (1550051041), we get a palindrome (2951551592).

The spelling of 1401500551 in words is "one billion, four hundred one million, five hundred thousand, five hundred fifty-one".