61451211 has 4 divisors (see below), whose sum is σ = 81934952. Its totient is φ = 40967472.

The previous prime is 61451189. The next prime is 61451227. The reversal of 61451211 is 11215416.

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

It is not a de Polignac number, because 61451211 - 2⁵ = 61451179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61451011) 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, 10241866 + ... + 10241871.

It is an arithmetic number, because the mean of its divisors is an integer number (20483738).

Almost surely, 2^61451211 is an apocalyptic number.

61451211 is a deficient number, since it is larger than the sum of its proper divisors (20483741).

61451211 is a wasteful number, since it uses less digits than its factorization.

61451211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20483740.

The product of its digits is 240, while the sum is 21.

The square root of 61451211 is about 7839.0822804714. The cubic root of 61451211 is about 394.6179310440.

Adding to 61451211 its reverse (11215416), we get a palindrome (72666627).

The spelling of 61451211 in words is "sixty-one million, four hundred fifty-one thousand, two hundred eleven".