13751551 has 4 divisors (see below), whose sum is σ = 15001704. Its totient is φ = 12501400.

The previous prime is 13751519. The next prime is 13751557. The reversal of 13751551 is 15515731.

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 13751551 - 2⁵ = 13751519 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 (13751557) 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, 625060 + ... + 625081.

It is an arithmetic number, because the mean of its divisors is an integer number (3750426).

Almost surely, 2^13751551 is an apocalyptic number.

13751551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13751551 is a deficient number, since it is larger than the sum of its proper divisors (1250153).

13751551 is a wasteful number, since it uses less digits than its factorization.

13751551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250152.

The product of its digits is 2625, while the sum is 28.

The square root of 13751551 is about 3708.3083744478. The cubic root of 13751551 is about 239.5800003838.

It can be divided in two parts, 1375 and 1551, that added together give a triangular number (2926 = T₇₆).

The spelling of 13751551 in words is "thirteen million, seven hundred fifty-one thousand, five hundred fifty-one".