61553119 has 2 divisors, whose sum is σ = 61553120. Its totient is φ = 61553118.

The previous prime is 61553117. The next prime is 61553143. The reversal of 61553119 is 91135516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61553119 - 2¹ = 61553117 is a prime.

It is a super-2 number, since 2×61553119² = 7577572917256322, which contains 22 as substring.

Together with 61553117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61553111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30776559 + 30776560.

It is an arithmetic number, because the mean of its divisors is an integer number (30776560).

Almost surely, 2^61553119 is an apocalyptic number.

61553119 is a deficient number, since it is larger than the sum of its proper divisors (1).

61553119 is an equidigital number, since it uses as much as digits as its factorization.

61553119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 31.

The square root of 61553119 is about 7845.5795834342. The cubic root of 61553119 is about 394.8359496086.

The spelling of 61553119 in words is "sixty-one million, five hundred fifty-three thousand, one hundred nineteen".