61124311 has 4 divisors (see below), whose sum is σ = 64341400. Its totient is φ = 57907224.

The previous prime is 61124309. The next prime is 61124359. The reversal of 61124311 is 11342116.

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 61124311 - 2¹ = 61124309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 3217069 = 61124311 / (6 + 1 + 1 + 2 + 4 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61124411) 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, 1608516 + ... + 1608553.

It is an arithmetic number, because the mean of its divisors is an integer number (16085350).

Almost surely, 2^61124311 is an apocalyptic number.

61124311 is a deficient number, since it is larger than the sum of its proper divisors (3217089).

61124311 is a wasteful number, since it uses less digits than its factorization.

61124311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217088.

The product of its digits is 144, while the sum is 19.

The square root of 61124311 is about 7818.2038218506. The cubic root of 61124311 is about 393.9169411868.

Adding to 61124311 its reverse (11342116), we get a palindrome (72466427).

The spelling of 61124311 in words is "sixty-one million, one hundred twenty-four thousand, three hundred eleven".