5451551 has 4 divisors (see below), whose sum is σ = 6230352. Its totient is φ = 4672752.

The previous prime is 5451547. The next prime is 5451557. The reversal of 5451551 is 1551545.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5451551 - 2² = 5451547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5451551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5451557) 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, 389390 + ... + 389403.

It is an arithmetic number, because the mean of its divisors is an integer number (1557588).

Almost surely, 2^5451551 is an apocalyptic number.

5451551 is a deficient number, since it is larger than the sum of its proper divisors (778801).

5451551 is an equidigital number, since it uses as much as digits as its factorization.

5451551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778800.

The product of its digits is 2500, while the sum is 26.

The square root of 5451551 is about 2334.8556700576. The cubic root of 5451551 is about 175.9975787374.

The spelling of 5451551 in words is "five million, four hundred fifty-one thousand, five hundred fifty-one".