61011451 has 4 divisors (see below), whose sum is σ = 64222600. Its totient is φ = 57800304.

The previous prime is 61011437. The next prime is 61011469. The reversal of 61011451 is 15411016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61011451 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: 3211129 = 61011451 / (6 + 1 + 0 + 1 + 1 + 4 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61011421) 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, 1605546 + ... + 1605583.

It is an arithmetic number, because the mean of its divisors is an integer number (16055650).

Almost surely, 2^61011451 is an apocalyptic number.

61011451 is a deficient number, since it is larger than the sum of its proper divisors (3211149).

61011451 is a wasteful number, since it uses less digits than its factorization.

61011451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211148.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 61011451 is about 7810.9827166625. The cubic root of 61011451 is about 393.6743489162.

Adding to 61011451 its reverse (15411016), we get a palindrome (76422467).

The spelling of 61011451 in words is "sixty-one million, eleven thousand, four hundred fifty-one".