1525722501 has 16 divisors (see below), whose sum is σ = 2089027584. Its totient is φ = 990085824.

The previous prime is 1525722493. The next prime is 1525722533. The reversal of 1525722501 is 1052275251.

It is not a de Polignac number, because 1525722501 - 2³ = 1525722493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525722551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17586 + ... + 57971.

It is an arithmetic number, because the mean of its divisors is an integer number (130564224).

Almost surely, 2^1525722501 is an apocalyptic number.

It is an amenable number.

1525722501 is a deficient number, since it is larger than the sum of its proper divisors (563305083).

1525722501 is a wasteful number, since it uses less digits than its factorization.

1525722501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75740.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1525722501 is about 39060.4979614956. The cubic root of 1525722501 is about 1151.2205066002.

Adding to 1525722501 its reverse (1052275251), we get a palindrome (2577997752).

The spelling of 1525722501 in words is "one billion, five hundred twenty-five million, seven hundred twenty-two thousand, five hundred one".