64151551 has 4 divisors (see below), whose sum is σ = 64170000. Its totient is φ = 64133104.

The previous prime is 64151537. The next prime is 64151561. The reversal of 64151551 is 15515146.

It is a happy number.

64151551 is nontrivially palindromic in base 9.

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 64151551 - 2⁵ = 64151519 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 (64151501) 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, 2251 + ... + 11548.

It is an arithmetic number, because the mean of its divisors is an integer number (16042500).

Almost surely, 2^64151551 is an apocalyptic number.

64151551 is a deficient number, since it is larger than the sum of its proper divisors (18449).

64151551 is a wasteful number, since it uses less digits than its factorization.

64151551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448.

The product of its digits is 3000, while the sum is 28.

The square root of 64151551 is about 8009.4663367792. The cubic root of 64151551 is about 400.3154823618.

Adding to 64151551 its reverse (15515146), we get a palindrome (79666697).

The spelling of 64151551 in words is "sixty-four million, one hundred fifty-one thousand, five hundred fifty-one".