61211403 has 32 divisors (see below), whose sum is σ = 101249280. Its totient is φ = 36227520.

The previous prime is 61211389. The next prime is 61211419. The reversal of 61211403 is 30411216.

It is a happy number.

61211403 is a `hidden beast` number, since 612 + 11 + 40 + 3 = 666.

It is not a de Polignac number, because 61211403 - 2⁴ = 61211387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61211473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10375 + ... + 15167.

It is an arithmetic number, because the mean of its divisors is an integer number (3164040).

Almost surely, 2^61211403 is an apocalyptic number.

61211403 is a deficient number, since it is larger than the sum of its proper divisors (40037877).

61211403 is a wasteful number, since it uses less digits than its factorization.

61211403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856 (or 4850 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61211403 is about 7823.7716607785. The cubic root of 61211403 is about 394.1039411580.

Adding to 61211403 its reverse (30411216), we get a palindrome (91622619).

The spelling of 61211403 in words is "sixty-one million, two hundred eleven thousand, four hundred three".