1515254551 has 2 divisors, whose sum is σ = 1515254552. Its totient is φ = 1515254550.

The previous prime is 1515254509. The next prime is 1515254561. The reversal of 1515254551 is 1554525151.

It is a strong prime.

It is an emirp because it is prime and its reverse (1554525151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1515254551 - 2⁷ = 1515254423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1515254561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757627275 + 757627276.

It is an arithmetic number, because the mean of its divisors is an integer number (757627276).

Almost surely, 2^1515254551 is an apocalyptic number.

1515254551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515254551 is an equidigital number, since it uses as much as digits as its factorization.

1515254551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25000, while the sum is 34.

The square root of 1515254551 is about 38926.2707050136. The cubic root of 1515254551 is about 1148.5816290424.

The spelling of 1515254551 in words is "one billion, five hundred fifteen million, two hundred fifty-four thousand, five hundred fifty-one".