61020553 has 16 divisors (see below), whose sum is σ = 69284160. Its totient is φ = 53233600.

The previous prime is 61020539. The next prime is 61020559. The reversal of 61020553 is 35502016.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61020553 - 2¹³ = 61012361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61020559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62358 + ... + 63328.

It is an arithmetic number, because the mean of its divisors is an integer number (4330260).

Almost surely, 2^61020553 is an apocalyptic number.

It is an amenable number.

61020553 is a deficient number, since it is larger than the sum of its proper divisors (8263607).

61020553 is a wasteful number, since it uses less digits than its factorization.

61020553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 61020553 is about 7811.5653360898. The cubic root of 61020553 is about 393.6939247264.

Adding to 61020553 its reverse (35502016), we get a palindrome (96522569).

The spelling of 61020553 in words is "sixty-one million, twenty thousand, five hundred fifty-three".