61456531 has 2 divisors, whose sum is σ = 61456532. Its totient is φ = 61456530.

The previous prime is 61456511. The next prime is 61456537. The reversal of 61456531 is 13565416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61456531 - 2⁹ = 61456019 is a prime.

It is a super-2 number, since 2×61456531² = 7553810405107922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61456493 and 61456502.

It is not a weakly prime, because it can be changed into another prime (61456537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728265 + 30728266.

It is an arithmetic number, because the mean of its divisors is an integer number (30728266).

Almost surely, 2^61456531 is an apocalyptic number.

61456531 is a deficient number, since it is larger than the sum of its proper divisors (1).

61456531 is an equidigital number, since it uses as much as digits as its factorization.

61456531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 61456531 is about 7839.4215985620. The cubic root of 61456531 is about 394.6293184345.

The spelling of 61456531 in words is "sixty-one million, four hundred fifty-six thousand, five hundred thirty-one".