61551349 has 4 divisors (see below), whose sum is σ = 62330560. Its totient is φ = 60772140.

The previous prime is 61551323. The next prime is 61551401. The reversal of 61551349 is 94315516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61551349 - 2⁷ = 61551221 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 (61551449) 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, 389487 + ... + 389644.

It is an arithmetic number, because the mean of its divisors is an integer number (15582640).

Almost surely, 2^61551349 is an apocalyptic number.

It is an amenable number.

61551349 is a deficient number, since it is larger than the sum of its proper divisors (779211).

61551349 is an equidigital number, since it uses as much as digits as its factorization.

61551349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779210.

The product of its digits is 16200, while the sum is 34.

The square root of 61551349 is about 7845.4667802496. The cubic root of 61551349 is about 394.8321649841.

The spelling of 61551349 in words is "sixty-one million, five hundred fifty-one thousand, three hundred forty-nine".