2151454551 has 8 divisors (see below), whose sum is σ = 2868922224. Its totient is φ = 1434144960.

The previous prime is 2151454517. The next prime is 2151454553. The reversal of 2151454551 is 1554541512.

It is a happy number.

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

It is not a de Polignac number, because 2151454551 - 2¹¹ = 2151452503 is a prime.

It is a super-2 number, since 2×2151454551² = 9257513370037223202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151454553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920 + ... + 65661.

It is an arithmetic number, because the mean of its divisors is an integer number (358615278).

Almost surely, 2^2151454551 is an apocalyptic number.

2151454551 is a deficient number, since it is larger than the sum of its proper divisors (717467673).

2151454551 is a wasteful number, since it uses less digits than its factorization.

2151454551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79041.

The product of its digits is 20000, while the sum is 33.

The square root of 2151454551 is about 46383.7746523501. The cubic root of 2151454551 is about 1290.9538747487.

The spelling of 2151454551 in words is "two billion, one hundred fifty-one million, four hundred fifty-four thousand, five hundred fifty-one".