2251540213501 has 2 divisors, whose sum is σ = 2251540213502. Its totient is φ = 2251540213500.

The previous prime is 2251540213493. The next prime is 2251540213537. The reversal of 2251540213501 is 1053120451522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2043467391001 + 208072822500 = 1429499^2 + 456150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251540213501 - 2³ = 2251540213493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251540213591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125770106750 + 1125770106751.

It is an arithmetic number, because the mean of its divisors is an integer number (1125770106751).

Almost surely, 2^{2251540213501} is an apocalyptic number.

It is an amenable number.

2251540213501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251540213501 is an equidigital number, since it uses as much as digits as its factorization.

2251540213501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 2251540213501 in words is "two trillion, two hundred fifty-one billion, five hundred forty million, two hundred thirteen thousand, five hundred one".