61421133 has 8 divisors (see below), whose sum is σ = 81988768. Its totient is φ = 40900464.

The previous prime is 61421123. The next prime is 61421179. The reversal of 61421133 is 33112416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61421133 - 2¹⁶ = 61355597 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 (61421123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8566 + ... + 14007.

It is an arithmetic number, because the mean of its divisors is an integer number (10248596).

Almost surely, 2^61421133 is an apocalyptic number.

It is an amenable number.

61421133 is a deficient number, since it is larger than the sum of its proper divisors (20567635).

61421133 is a wasteful number, since it uses less digits than its factorization.

61421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23483.

The product of its digits is 432, while the sum is 21.

The square root of 61421133 is about 7837.1635812965. The cubic root of 61421133 is about 394.5535371126.

Adding to 61421133 its reverse (33112416), we get a palindrome (94533549).

The spelling of 61421133 in words is "sixty-one million, four hundred twenty-one thousand, one hundred thirty-three".