51970549 has 2 divisors, whose sum is σ = 51970550. Its totient is φ = 51970548.

The previous prime is 51970543. The next prime is 51970553. The reversal of 51970549 is 94507915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 6502500 = 6743^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 51970549 - 2¹³ = 51962357 is a prime.

It is a super-2 number, since 2×51970549² = 5401875926722802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51970543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25985274 + 25985275.

It is an arithmetic number, because the mean of its divisors is an integer number (25985275).

Almost surely, 2^51970549 is an apocalyptic number.

It is an amenable number.

51970549 is a deficient number, since it is larger than the sum of its proper divisors (1).

51970549 is an equidigital number, since it uses as much as digits as its factorization.

51970549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 51970549 is about 7209.0602022732. The cubic root of 51970549 is about 373.1806368706.

The spelling of 51970549 in words is "fifty-one million, nine hundred seventy thousand, five hundred forty-nine".