2515401281 has 2 divisors, whose sum is σ = 2515401282. Its totient is φ = 2515401280.

The previous prime is 2515401197. The next prime is 2515401331. The reversal of 2515401281 is 1821045152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2341688881 + 173712400 = 48391^2 + 13180^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515401281 - 2²² = 2511206977 is a prime.

It is a super-2 number, since 2×2515401281² = 12654487208912881922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2515401181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1257700640 + 1257700641.

It is an arithmetic number, because the mean of its divisors is an integer number (1257700641).

Almost surely, 2^2515401281 is an apocalyptic number.

It is an amenable number.

2515401281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515401281 is an equidigital number, since it uses as much as digits as its factorization.

2515401281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2515401281 is about 50153.7763383776. The cubic root of 2515401281 is about 1359.9901385170.

The spelling of 2515401281 in words is "two billion, five hundred fifteen million, four hundred one thousand, two hundred eighty-one".