149486551 has 4 divisors (see below), whose sum is σ = 149938504. Its totient is φ = 149034600.

The previous prime is 149486531. The next prime is 149486563. The reversal of 149486551 is 155684941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155684941 = 89 ⋅1749269.

It is a cyclic number.

It is not a de Polignac number, because 149486551 - 2¹⁹ = 148962263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149486498 and 149486507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149486521) 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, 225480 + ... + 226141.

It is an arithmetic number, because the mean of its divisors is an integer number (37484626).

Almost surely, 2^149486551 is an apocalyptic number.

149486551 is a deficient number, since it is larger than the sum of its proper divisors (451953).

149486551 is an equidigital number, since it uses as much as digits as its factorization.

149486551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451952.

The product of its digits is 172800, while the sum is 43.

The square root of 149486551 is about 12226.4692777596. The cubic root of 149486551 is about 530.7223460151.

The spelling of 149486551 in words is "one hundred forty-nine million, four hundred eighty-six thousand, five hundred fifty-one".