61520053 has 8 divisors (see below), whose sum is σ = 70375680. Its totient is φ = 52681200.

The previous prime is 61520051. The next prime is 61520071. The reversal of 61520053 is 35002516.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61520053 - 2¹ = 61520051 is a prime.

It is a super-2 number, since 2×61520053² = 7569433842245618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61520051) 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, 5028 + ... + 12178.

It is an arithmetic number, because the mean of its divisors is an integer number (8796960).

Almost surely, 2^61520053 is an apocalyptic number.

It is an amenable number.

61520053 is a deficient number, since it is larger than the sum of its proper divisors (8855627).

61520053 is a wasteful number, since it uses less digits than its factorization.

61520053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8387.

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

The square root of 61520053 is about 7843.4719990576. The cubic root of 61520053 is about 394.7652357048.

Adding to 61520053 its reverse (35002516), we get a palindrome (96522569).

The spelling of 61520053 in words is "sixty-one million, five hundred twenty thousand, fifty-three".