61573451 has 2 divisors, whose sum is σ = 61573452. Its totient is φ = 61573450.

The previous prime is 61573441. The next prime is 61573453. The reversal of 61573451 is 15437516.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61573451 is a prime.

Together with 61573453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61573453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30786725 + 30786726.

It is an arithmetic number, because the mean of its divisors is an integer number (30786726).

Almost surely, 2^61573451 is an apocalyptic number.

61573451 is a deficient number, since it is larger than the sum of its proper divisors (1).

61573451 is an equidigital number, since it uses as much as digits as its factorization.

61573451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 61573451 is about 7846.8752379530. The cubic root of 61573451 is about 394.8794184093.

The spelling of 61573451 in words is "sixty-one million, five hundred seventy-three thousand, four hundred fifty-one".