61507253 has 2 divisors, whose sum is σ = 61507254. Its totient is φ = 61507252.

The previous prime is 61507249. The next prime is 61507261. The reversal of 61507253 is 35270516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31114084 + 30393169 = 5578^2 + 5513^2 .

It is a cyclic number.

It is not a de Polignac number, because 61507253 - 2² = 61507249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61507153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30753626 + 30753627.

It is an arithmetic number, because the mean of its divisors is an integer number (30753627).

Almost surely, 2^61507253 is an apocalyptic number.

It is an amenable number.

61507253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61507253 is an equidigital number, since it uses as much as digits as its factorization.

61507253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 61507253 is about 7842.6559914356. The cubic root of 61507253 is about 394.7378552261.

Adding to 61507253 its reverse (35270516), we get a palindrome (96777769).

The spelling of 61507253 in words is "sixty-one million, five hundred seven thousand, two hundred fifty-three".